292 LEPTIDiE 



antennae ; the raised epistomal knob rather prominent and slightly more 

 blackish grey ; jowls small but obvious ; pubescence on the back part of 

 the jowls and on the moderately and equally puiFed-out lower two-thirds 

 of the back of the head rather long and abundant though not very con- 

 spicuous, greyish white and outstanding ; upper third of the back of the 

 head almost flush with the eyes and still with greyish though shorter 

 pubescence and with a row of small bristles quite close to the eyes ; the whole 

 back of the head rather darker gi'ey than the face ; ocellar triangle very 

 much elevated, brownish grey, and bearing moderately long pale pubescence 

 which slopes forward ; vertical triangle long and pointed, so that its lowest 

 point and the highest point of the frontal triangle extend towards each 

 other and leave the eyes closely approximated (though hardly touching) for 

 about one-third the distance from the occiput to the antennae. Proboscis 

 dull blackish brown, long and produced, with large sucker-flaps ; palpi 

 greyish black, long, thin, and slightly drooping, more than half as long as 

 the proboscis, and bearing dark bristly hairs. Eyes bare ; facets on the front 

 part possibly a little enlarged but hardly perceptibly so. Antennae blackish 

 brown, but with a grey shimmer caused by minute dust ; two basal joints 

 transverse, almost equally long, and bearing on their upper side dark bristly 

 hairs which are directed forwards; third joint reniform, being small at the 

 upper part but extended downwards in a rather hammer-like shape far below 

 the lower line of the basal joints, and minutely pubescent on what may be 

 called the tip as it is the part farthest away from the head, but altogether the 

 third joint not so long as the second though much deeper; arista arising 

 from near the base of the third joint or (say) at the angle where the third 

 joint bends over, more than twice as long as the antennae, thin though slightly 

 less thin on the basal fifth, and microscopically pubescent but with the 

 extreme tip very thin and bare. 



Thorax and scutellum shining black, hardly obscured, rather sparse very 

 fine grey dust, and with sloping greyish yellow pubescence which is not short 

 or scarce and which occurs all over the disc but not abundantly enough 

 to appreciably affect the ground colour; humeri and postalar calli with a 

 yellowish grey tinge ; pleurae ashy grey, but a large triangular patch which 

 occupies the upper front corner of the mesopleurae is greyish yellow, and the 

 pteropleurae are also rather yellowish ; pubescence of the pleurae limited to 

 a few pale inconspicuous hairs on the hind and lower parts of the mesopleurae 

 and on the metapleurae ; metanotum greyish black. 



Abdomen narrower than the thorax and about twice as long as the thorax 

 and scutellum together, almost parallel-sided, shining black with luteous 

 cross-bands ; the first luteous band occupies the hindmargin of the basal 

 segment rather narrowly and the foremargin of the second segment rather 

 broadly ; the second band occupies the hindmargin of the second segment and 

 the foremargin of the third segment and consequently the second segment has 

 a brownish black band across its middle of which the foremargin undulates 

 because it rises a little at the sides and has a long shallow arch on its middle ; 

 the third luteous band is not so sharply defined and occupies about the hind 

 third of the third segment and sometimes just the foremargin of the fourth 

 segment ; a still less defined fourth cross-band occupies the hind quarter 

 of the fourth segment, while sometimes there are traces of a band on the hind- 

 mai*|in of the fifth segment ; the five basal segments nearly equal in length 

 but the sixth, seventh, and eighth so short dorsally as to be hardly visible, 

 though easily distinguished ventrally ; pubescence sparse and equally 

 scattered, not short but inconspicuous, suberect, long and yellow, though 

 there are a few shorter black bristly hairs on the middle of the disc of the 

 third segment. Belly luteous on the three basal segments and on the hind- 

 margin of the fourth segment, but on the other segments of the same shining 

 blackish brown colour as on the dorsal side, and with minute sparse pale dust : 

 sixth, seventh, and eighth segments well defined and nearly equal, but jointly 

 hardly longer than the fifth segment ; pubescence long, sparse, straggly 

 and pale on the four basal segments, but short, grey, and inconspicuous on 

 the last four segments. Genitalia large and well separated from the abdomen, 

 with a large greyish-black brown dorsal plate which covers everything, not 

 so wide as the last dorsal abdominal segment, dulled and bearing sloping 



