394 TABANID^ 



(J. Frontal triangle bare, greyish yellow witli tlie upper angle darkened and 

 prolonged narrowly a short distance between the eyes ; face and jowls 

 greyish yellow, clothed with dense but rather short yellowish grey 

 pubescence which is rather longer on the jowls ; back of the head very 

 shallow on the lower part and hollowed out behind the eyes on the upper 

 part, yellowish grey against the eyes, and bearing a very short ciliation which 

 is yellowish below but becomes darkened on the upper part ; ocellar tubercle 

 blackish brown and bearing very short pubescence. Palpi didl orange ; end- 

 joint moderately short being about twice as long as the breadth of its middle 

 part, with a bluntly rounded end and even sometimes with a very slightly 

 depressed conical tip, bearing numerous depressed black bristles on the out- 

 side with a few yellow ones usually intermixed, and with sparser yellowish 

 grey hairs inside and beneath. Eyes bare, unicolorous green in Ijf e ; facets all 

 practically equally small. Antennre blackish brown at the base but usually 

 to a certain extent obscurely reddish brown about the base and especially 

 about the base of the third joint ; basal joint with the tip above somewhat 

 hooked over the base of the second joint and bearing dense short black bristles 

 on its inner side and above, but on the outer side and beneath with mainly 

 thinner (but almost equally short) pale hairs ; second joint with its tip 

 above prolonged over the base of the third joint, and also clothed with short 

 black bristles ; third joint strongly humped dorsally near its base and then 

 excavated at a rather prominent angle, its basal segment less than one and a 

 half times as long as its depth at the hump and with a few very inconspicuous 

 tiny black bristles on the top of its hump and about the middle of its under- 

 side ; style-like portion nearly as long as the basal segment of the third 

 joint and with indistinct annulations, but with, its three basal segments 

 about equal and the fourth one about as long as the other three together 

 and hardly pointed, while all the segments bear minute very sparse 

 bristles. 



Thorax dull greyish black with a glaucous hue when seen from behind, 

 faintly shining on the disc, with five indistinct greyish yellow stripes ; 

 prtealar calli rather brownish. Pubescence short, niainly composed of nearly 

 erect rather dense black hairs, on especially the prtealar calli, but with thin 

 light grey hairs intermixed on the disc and with mainly yjale brownish hairs 

 in front of the prsealar calli, and with depressed yellowish patches above the 

 wing-bases and after the postalar calli ; pleurae with longer light brownish 

 grey pubescence, and with a yellow tuft beneath the wing-base and sometimes 

 with a slight clump of black hairs just in front of this tuft. Scutellum greyish 

 black, with similar pubescence to that on the disc of the thorax but with 

 more obvious pale pubescence around the margin. 



Abdomen brownish orange or dull tawny on the basal segments, but with 

 a black dorsal stripe and with the tip darkened or even blackish, and with 

 darkened reflections on the Ijasal half of the second and third segments, but 

 with a row of triangular whitish spots on the black dorsal stripe which are 

 placed on the middle of the hindmargin of each of the five basal segments, and 

 these whitish spots do not quite or barely extend up to the middle of each 

 segment ; the second to fourth segments have brownish yellow hindmargins 

 which bear bands of short fine whitish or yellow pubescence, but these 

 bands are rather interrupted on each side of the triangular middle spots ; 

 third to last segments becoming gradually darker brown to black and then 

 their conspicuously pale hindmargins standing out all the more obvious. 

 Pubescence all very short, conspicuous and yellowish as bands on the hind- 

 margins and on the pale middle spots and on most of the basal segment, but 

 minute and black on the other parts of the disc ; sidemarginal pubescence 

 yellow except at the basal corners of the segments. Belly luteous, but with 

 a broad middle stripe (rather interrupted at the hindmargins of segments) and 

 A\dth the last three segments blackish brown to shining black though sometimes 

 entirely dusted Avith greyish yellow ; hindmai'gins of segments yellow ; side- 

 margins of the dorsal plates unicolorous yellowish when viewed from the belly 

 side ; pubescence very short ; the usual longer erect black hairs beneath the 

 seventh segment rather inconspicuous. Genitalia two-jointed, small, mainly 

 dull blackish but orange on the upper margin of the second joint, ancl mainly 

 black haired on the basal joint ; small inner lamellae yellow. 



