150 STRATIOMYIDiE 



forwards from the frontal prominence, and is slightly longer than half 

 the third joint ; second joint short, being hardly longer than deep, and 

 commencing a sharp divergence, which is carried on by the long and thin 

 third joint, so that at their tips the antennae are separated by rather 

 more than their own length ; the third joint is long and thin, being 

 about eight times as long as deep, with its tip slightly attenuated but blunt 

 and with no sign of any style ; the two basal joints bear inconspicuous very 

 short decumbent black bristly pubescence, but the third joint is quite 

 bare. 



Thorax black, rather shining but with dense though not coarse punctuation ; 

 pubescence dense and downy, nearly erect, but not so dense as to obscure the 

 ground colour, not long, mainly light brownish grey, but when viewed from 

 in front there appears to be a fair-sized patch of blackish sheen in the 

 pubescence on each side between the postalar calli and the suture, but this is 

 only caused by darker grey and less dense pubescence ; pleurae with lighter 

 grey, longer, and quite as dense pubescence, which is rather tangled and 

 shaggy on the metapleurae. Scutellum bright yellow with a small middle 

 basal transverse black spot and just the basal corners black, and the two 

 spines (which are wide apart) becoming rather obscure orange towards the 

 tip ; pubescence yellow, long, thin, and sparse, but inconspicuous. 



Abdomen black, with three pairs of large conspicuous spots and the tip 

 orange ; rather dull because of the exceedingly dense though exceedingly minute 

 punctuation ; basal segment black ; second segment with a large pale orange 

 si^ot on each side which occupies all the sidemargin and which leaves the 

 middle half of the hindmargin black, and this black part widens out upwards 

 in a sloping line to the middle three-quarters of the foremargin and thus 

 leaves all the shoulders of the segment broadly orange, and the inner angle 

 of each orange spot is rather rounded ; third segment with less than the hind 

 fifth of the sidemargins yellow, and the yellow colour extending along the hind- 

 margin of the segment for quite as far as on the second segment but gradually 

 widening until at the irregularly rounded inner ends the yellow spots occupy 

 about half the depth of the segment ; fourth segment contracting in width on 

 its hinder half and therefore the similar yellow spots more approximated at 

 the middle, but beginning narrower at the sidemargins than in the third 

 segment and curving up on the front margin of the spots to more than half 

 the depth of the segment at their inner ends and with a straighter inner 

 margin ; fifth segment rapidly contracting in width, with all its hindmargin 

 orange and forming the base of an equilateral orange triangle with a rounded 

 top which extends fully two-thirds up the segment ; after the fifth segment 

 there is a trace of a yellow sixth segment. Pubescence on the dorsum rather 

 dense, almost erect, brownish orange but inconspicuous on all the dorsal dark 

 part, bat the broad flat outer part of the abdomen appears to be bare but 

 actually bears very short, but coarse depressed, pubescence, which is black 

 on the black parts and yellow on the yellow parts, and this short coarse 

 black pubescence exists on all the raised dorsal part but is not noticeable 

 under the long brownish orange hairs, and even round the front of the shoulders 

 of the abdomen the pale pubescence is only moderately long. Belly dull 

 . yellow, rather orange down the middle, and with black transverse spots ; 

 basal segment black ; second segment with a pair of narrow transverse black 

 lines near the foremargin, but not near each other nor even nearly reaching the 

 sides ; third segment with a pair of broader but still very transverse black 

 spots near the middle of the foremargin, with very narrow black lines running 

 out from them along the foremargin though not nearly to the sides ; fourth 

 segment with similar but larger black spots which practically unite at the 

 middle but leave the actual foremargin there yellowish orange, and these 

 spots are continued out narrowly along the foremargin but not nearly to the 

 sides ; fifth segment with a long very narrow black foremarginal line which 

 is almost extended to the sides ; the actual marginal line of tlie abdomen is 

 yellow and black, being yellow on all the second segment but only at just the 

 hind corners of the next three segments ; pubescence of the belly abundant 

 and rather long, whitish yellow, and slightly sloping backwards. Genitalia 

 slightly protruding, the middle plate shining blackish brown, with a pair of 

 almost equally long rather orange brown side lamellie, and slightly beyond and 



