6. CHRYSOPILUS 307 



markings, though sometimes in completely denuded specimens with faint 

 traces of a pair of widely separated narrow pale grey stripes which may 

 extend transversely along the suture, but in good specimens the ground colour 

 mainly hidden by abundant decumbent coarse golden or yellow pile, amongst 

 which some longer thin erect obscurely yellow hairs occur on the sides 

 between the humeri and the wings, and also on the postalar calli, on the hind 

 part of the thorax (dorso-central rows ?), and on the margin of the scutellum ; 

 pleurje ashy grey, with moderate pale yellow or whitish pubescence on the pro- 

 thorax, on the upper part of the mesopleurai, and on the extreme hindmargin of 

 the pteropleurse, and with the usual thin though extensive tuft on the lower 

 part of the metapleuraj, which is followed after a bare space by the shorter 

 denser more conspicuous tuft on the outer humps of the metanotum. 



Abdomen slender from the end of the second segment to the widened 

 knob-like seventh segment and genitalia, dull dark greyish brown or greyish, 

 with only the broad base of each segment darkened or even almost blackened, 

 but the ground colour obscured in good specimens by rather short depressed 

 golden pile which is fairly abundant all over except on the blackish basal 

 part of each segment, and even in worn specimens a slight crest is usually 

 left on the hindmargin of the basal segment ; pubescence on the sides of the 

 four or five basal segments long, erect, and pale, though rather inconspicuous. 

 Belly greyish black, with fairly abundant moderately short sloping pale 

 pubescence on the five basal segments but with shorter black pubescence on 

 the next two segments. Genitalia knobbed ; lateral lamellae two-jointed, the 

 basal joint being large and almost oblong and densely pubescent above, but 

 the thin and shorter second joints arched inwards and almost meeting each 

 other and enclosing the pair of short black basal lamellae and the pointed 

 middle piece, and usually leaving a clear open space between the end of these 

 and the approximated (or touching) tips of the lateral lamellae. 



Legs dull yellow, but the tarsi becoming obscured soon after the middle 

 of the basal joint ; coxcS and trochanters darkened, but the coxae covered with 

 light ashy grey dust "with usually a translucent tinge of yellow, and bearing 

 not very conspicuous obscure pale yellow pubescence ; hind femora rarely 

 darkened on the upper side of the apical half. Pubescence practically none, 

 but the spurs yellowish with black tips, the two spurs on the middle tibiae 

 being longer than the one on the hind tibiae. 



Wings hyaline with a very slight greyish tinge ; stigma blackish brown or 

 sometimes lighter, short but broad and nearly reaching the end of the 

 marginal cell ; radial vein rather suddenly curved up to the costa ; anal cell 

 closed only a little before the wingmargin ; base of the wing and the veins 

 thereabouts tinged (often strongly) with orange or light brown, but the veins 

 gradually becoming darker until they become black long before the end ; 

 subcostal vein with very minute scattered spines on nearly all its length ; in 

 very perfect specimens there is a small tuft of yellow hairs at the extreme 

 base of the costa. Squamte (alar) glassy with a blackish spot on the upper 

 part against the wing, and with clear orange or pale brown margin and pale 

 yellow fringes. Halteres with the knob, or at least its top half, brown, but the 

 stem obscure yellow or even quite orange. 



Not unlike the male. Frons light ashy grey with sometimes a tinge of brown, 

 more than one-third the width of the head at its narrowest part (= the middle), 

 but widening considerably towards the occiput ; face (including the side-cheeks) 

 beginning as wide as the adjacent part of the frons but widening downwards ; 

 frons with scattered tiny blackish or obscurely luteous bristles, and with rather 

 longer and yellower bristles behind the ocellar space (leaving the sides near the 

 ocellar space broadly bare), and there is a row of similar bristles extending down 

 the back of the head near but not quite close to the eyes and then extending to 

 the more numerous and longer whitish bristly hairs, which in turn merge into 

 the longer pubescence on the lower part of the back of the head. Palpi 

 sonietimes more ferruginous and with only rather sparse hairs. Eyes in life 

 vivid g-reen with a faint brownish line across just above the middle but only 

 visible in certain lights, or (as noted in another specimen) evenly green with 

 a slight coppery gloss in some lights. Antenna3 below the middle of the 

 head ; third joint slightly larger. 



