338 TABANID.E 



about the sides and abundantly on the dark grey prcealar calli. Pleura with 

 abundant shaggy yellowish grey pubescence and a large_ dense tuft of black 

 hairs on the mesopleuree. Scutellum dull black, very slightly grey about the 

 sides ; pubescence almost as on the disc of the thorax but with a very few 

 black hairs intermixed. 



Abdomen deep dull black with the hindmargins (after the basal one) 

 conspicuously pale grey, and the fourth to sixth segments each bearing a pair 

 of conspicuous round pale grey (almost whitish) spots above the middle (or even 

 close to the foremargin on the fifth and sixth segments) ; there is neither a 

 dorsal grey line, nor any ferruginous markings about the sides near the 

 base. Pubescence on the disc suberect long and mainly black, though pale 

 hairs are sometimes intermixed on the middle of the basal segment, near the 

 foremargin of the thiixl segment, about the grey spots on the fourth and fifth 

 segments, and near the sides of the fore and hind margins of the fifth 

 segment, and also extensively on the sides of the hindmargin of the sixth 

 segment, but none of these pale hairs are conspicuous ; sidemarginal 

 pubescence long (when seen sideways) brownish yellow and rather con- 

 spicuous and extending a little along the hindmargins of the fourth, fifth, 

 and sixth segments, though numeroiis black hairs occur very near the side- 

 margins of the third segment. Belly grey, with rather abundant rather 

 sloping greyish yellow pubescence, but with several black hairs on the disc of 

 the sixth segment, while all the disc of the seventh segment bears erect curved 

 bristly black hairs ; pubescence on the two basal segments and partly on the 

 third longer and more shaggy than on the rest. 



Legs colored black and orange very similarly to H. xilumalis^ but the 

 dark parts are blacker and the orange i-ings considerably narrower, while the 

 knees are hardly at all orange ; front coxse greyish black, with long pale 

 pubescence on the basal half but with black pubescence on the anterior apical 

 half ; front tibia? black with a comparatively narrow conspicuous orange ring 

 near the base. Pubescence behind the front femora longer and blackei-, and 

 there is a slight fringe behind the basal half of the front tibise ; pulvilli pale 

 greyish brown. 



Wings (fig. 224) more darkly and boldly marmorated than in H. pluvialis^ 



Fio. 224. — Hcematopota crassicornis ?. x 8. 



the ground colour having no trace of muddiness or yellowish tinge, while the 

 hyaline markings form a larger and bolder pattern ; the two incomplete 

 hyaline ocelli in the discal cell usually meet in the middle of the cell and 

 form there a Y- or V -shaped marking, though sometimes they do not meet 

 but still are not so widely separated as in //. pluvialis ; the first posterior 

 cell has more clearly defined hyaline markings above the discal cell, while the 

 fourth and fifth posterior cells have more or less V-^haped hyaline markings ; 

 the lower veinlet ending the discal cell is usually margined dark : there are 

 usually two incomplete hyaline bands before the tip of the wing or which the 

 outer one is very imperfectly continued round the posterior margin of the wing, 

 and there is usually a vague indication of a large ocellus beginning with the 

 hyaline middle of the discal cell and passing down along the middle of the 

 fourth posterior cell and then turning upwards through the third, second, 

 and first posterior cells and back along the top of the first posterior cell to 

 the starting point. Squama? darker greyish brown than in //. pluvialis and 

 with brown margins, or even blackish gTey with almost black margins even on 

 the thoracal i^air. Halteres as in //. j^luvialis. 



