518 



short palpi short, 1st joint somewhat attenuated, the other 

 three joints stouter. Antennae with the unusual number of 

 thirteen joints ; * if bent backwards they would barely reach the 

 dorsum of the thorax ; the joints of the fiagellum oblong ; 

 antennae of the male with dense delicate pubescence, the 

 alternate joints with short verticels. Thorax with the anterior 

 part produced into a short neck, moderately broad ; the dorsum 

 moderately arched, the suture distinct. Abdomen elongate. 

 Genitalia of male club-shaped, consisting of the usual large basal 

 pair of claspers surmounted by horny terminal appendages ; one 

 pair of these appendages is elongate needle-shaped,t conspicuous 

 in, at least, living specimens, apparently shrivelling up in dried 

 ones. The female ovipositor has the upper valves rather long, 

 broad, arcuated and blunt; the lower ones being shorter and 

 moderately broad. Legs long and slender ; tibiae with minute 

 spurs ; + empodia distinct, ungues very minute. Wings rather 

 elongate or moderately broad ; two submarginal cells and five 

 posterior cells ; the discal cell closed or open. The auxiliary 

 vein ending at about three-fourths the length of the wing, the 

 1st longitudinal vein a little beyond ; the subcostal cross- vein at 

 about one-third of the wing ; the 2nd longitudinal vein begins in 

 a curve, about the middle of the wing, the praafurca from one- 

 third to one-half the length of the vein, the branches approxi- 

 mately parallel; the 3rd vein issuing either from towards the end 

 of the praefurca or from the beginning of the lower branch ; the 

 anterior cross-vein nearly or quite in a line with the basal section 

 of it, joining the 4th vein at or very near its forking ; upper 

 branch of 4th vein practically in a straight line with the basal 

 section, forked near its tip ; the lower branch forked before its 

 middle, the proximal end of the 3rd posterior cell pointed ; the 

 posterior cross-vein just beyond the fork of the 4th vein ; the 

 5th, 6th, and 7th longitudinal veins nearly straight. 



Range. The only three species previously known are from 

 North America. 



Only two Indian species are referable to RhapTiidolabis. and 

 there seems no reasonable doubt that they belong to this genus 

 as the venation and other characters agree, though each has dis- 

 tinctly 15-jointed antennae, whereas Osten Sacken specifies 13 as 

 the normal number. The generic diagnosis may advisably be 

 altered to embrace 15-jointed species. 



The two species may be distinguished as follows : 



Wings wholly unmarked indica, sp. n. 



Wings with several small blackish infuscations . fascipennts, sp. n. 



* This is on the authority of Osten Sacken, referring to B. ienuipes, Os. 



Sac., of which he examined a living specimen. 



t From which the generic name is derived, meaning " needle-forceps.'' 



\ These may easily be overlooked, according to Osten Sacken ; personally 



I have not been able to detect any. 



