DESCRIPTION OF A NEW SPECIES OF THE GENUS EUBORELLIA BURR,1909 (INSECT A: DERMAPTERA) FROM NAINIT AL DISTRICT OF UTTARAKHANDSTATE

The present paper is based on the study of a new species of Euborellia Burr, 1909 collected from Nainital district of Uttarakhand state (Western Himalayan Ecosystem). Gangola(1968) has described two new species viz;Euborellia kumaonensis collected from Nainital district and Euborellia askotensis from Pithoragarh district of Uttarakhand but on the basis of the description and figures provided in his paper, the fate of the systematic position of these species is uncertain. Srivastava (2003) has provided detailed description of 08 species of Euborellia which includes 04 new species. Out of these, 02 species viz; Euborellia annulipes (Lucas,1847) and Euborellia compressa (Borelli, 1907) are apterous, having sides of abdominal segments carinate. The first one has the genital parameres with external apical angle rounded while the second species has external apical angle acute with a little projection. The new species described here comes close to these two species in being apterous with sides of abdominal segments carinate but differs in the structure of parameres having external apical angles neither round nor acute. Besides the structure of the distal lobe is also different from these two species. Moreover, there are marked differences in the shape of pronotum, metanotum and in having crenulated inner margin of forceps. Another distinguishing character which differentiates this species is its smooth and almost quadrate ultimate tergite which is transeverse with weak punctuation in E. annulipes and also transeverse with almost smooth in E. compressa. The other remarkable characters include its smooth abdomen which is punctulated in E. annulipes and its truncated penultimate sternite which is subtrunkate in E. compressa.


INTRODUCTION
The present paper is based on the study of a new species of Euborellia Burr, 1909 collected from Nainital district of Uttarakhand state (Western Himalayan Ecosystem). Gangola(1968) has described two new species viz;Euborellia kumaonensis collected from Nainital district and Euborellia askotensis from Pithoragarh district of Uttarakhand but on the basis of the description and figures provided in his paper, the fate of the systematic position of these species is uncertain. Srivastava (2003) has provided detailed description of 08 species of Euborellia which includes 04 new species. Out of these, 02 species viz; Euborellia annulipes (Lucas,1847) and Euborellia compressa (Borelli, 1907) are apterous, having sides of abdominal segments carinate. The first one has the genital parameres with external apical angle rounded while the second species has external apical angle acute with a little projection. The new species described here comes close to these two species in being apterous with sides of abdominal segments carinate but differs in the structure of parameres having external apical angles neither round nor acute. Besides the structure of the distal lobe is also different from these two species. Moreover, there are marked differences in the shape of pronotum, metanotum and in having crenulated inner margin of forceps. Another distinguishing character which differentiates this species is its smooth and almost quadrate ultimate tergite which is transeverse with weak punctuation in E. annulipes and also transeverse with almost smooth in E. compressa. The other remarkable characters include its smooth abdomen which is punctulated in E. annulipes and its truncated penultimate sternite which is subtrunkate in E. compressa.

Description:
Male: Body smooth, general color ranging from light brown to blackish brown, antennae brown with two apical segments light blackish brown,Pronotum, Meso-and Metanotum brown, legs light brown, femora with deep brownish bands at about middle, abdominal tergites, ultimate tergite and forceps blackish brown.
Head smooth, pentagonal, slightly broader than long, frons tumid, frontal sutures faint, median suture distinct, hind margin slightly emarginated posteriorly in the middle. Eyes black, prominent, much smaller than, post-ocular area. Antennae 15+ (broken) segmented, first stout, shorter than the distance between antenna I bases, expanded apically, 2 nd short, about as long as broad, 3 rd long and slender, 4th slightly shorter than preceeding, gently expanded apically, 6 th and onwards gradually slightly thinning, increasing in length distally with slight expansion towards apices. Elytra and wings absent. Pronotum smooth, quadrangular, anteriorly a little less wide than head, posterior margin very slightly wider than its length, anterior margin feebly convex, lateral margins gently sinuate and slightly reflexed towards middle, sides slightly diverging posteriorly, hind margin briefly rounded with a faint emargination in the middle, median sulcus fine but distinct, passing through a faint depression in the middle posterior zone of prozona. Prozona well differentiated with metazona. Both lateral zones of prozona more tumid than metazona. Meso and metanotum transverse, both shorter in length than pronotum. Mesonotum with hind margin truncate. Metanotum with hind margin briefly and steeply undulated forming deep emargination at hind mid point. Legs typical of the genus, femora with deep brownish bands in middle. Abdomen smooth, gently narrowed anteriorly. Sides of abdominal segments 6 th -9 th acute angled posteriorly and carinate. Penultimate Sternite smooth with hind margin truncate. Ultimate tergite almost quadrate, smooth, convex above, gently Rec. zool. Sum India expanded in middle, sloping anteriorly and posteriorly, hind margin scarcely emarginated, laterally oblique, minute tubercles present above the roots of forceps. Median sulcus distinct. Forceps with branches subcontiguous and stout at base, trigonal upto about basal half, straight upto about two-third, afterwards depressed gradually, tapering apically, incurving in apical one third, asymmetrical with right branch more strongly incurved ending in apices hooked and pointed, inner margin crenulated.
Genitalia with parameres quadrangular, as long as broad, externalapical angles gently dilated at its apices without any marked convexity or concavity, distal lobes with characteristic chitinous pads, oblique median membrane and virga discernible. Weakly transverse, about Triangular, longer than Pentagonal, slightly broader than long. as long as broad. broad.
Pronotum About as long as broad, Slightly longer than Square shaped anteriorlya little less wide anteriorly as wide as broad, anteriorly as than head, lateral margins gently sinuate head, Lateral margins wide as head, Lateral towards middle, posteriorly slightly widened posteriorly. margins straight, wider than the length of the pronotum. gently widened posteriorely.

Metanotum Hind margin broadly
Hind margin broadly Hind margin briefly and steeply emarginate emarginate undulated froming deep emagination at hind mid point.