426 



TABANID^ 



segments luteous in full connection with the dorsal side-spots, third segment 

 slightly luteous at the sides ; pubescence not scarce but composed of scattered 

 long black and shorter pale hairs, of which the pale hairs mainly form hind- 

 marginal fringes, except about the tip and on the second segment where the 

 whole of the disc bears longer and more abundant pale hairs ; side fringes 

 mainly black, but conspicuously pale on the luteous part. 



Legs black, moderately shining, with the basal half of the first joint of the 

 posterior tarsi obscurely reddish ; front coxae two-thirds as long as the femora, 

 and bearing mixed pale and black pubescence ; front femora with rather 

 abundant pubescence which is nearly all black ; middle femora with similar 

 pubescence, but with a patch of pale hairs behind near the base ; hind 

 femora with less pubescence, which is mostly black but contains some pale 

 hairs behind near the base ; anterior tibiae almost bare ; middle tibi^ with 

 two not quite equal black spurs ; hind tibiae with dense black fringes of 

 which the antero-dorsal one is the longer and coarser, and with two short 

 black spurs ; pulvilli yellowish. 



Wings mainly blackish or brownish black on the disc and about the tip, but 

 a small oval quite hyaline spot occurs at the first fork of the discal vein 

 and extends slightly down its stem and is sometimes connected with 

 the light colored outer part (not including the tip) of the upper basal 

 cell, and the wings are hyaline (with a brownish tinge) on the fork of the 

 cubital vein, on the adjoining portion of the first submarginal cell so as 

 almost to separate the dark parts, and on the subapical portion from the 

 lower half and margin of the cubital cell to the lower outer corner of the 

 third posterior cell ; outer margin of the blackish brown middle portion 

 of the wing irregularly perpendicular ; all the axillary cell and the large alula 

 brownish hyaline, but the anal cell da.rkened ; sometimes the fourth and fifth 

 posterior cells have pale kernels. Squamte rather large, blackish with black 

 margins, and with a very slight dark fringe. Halteres blackish, knobs rather 

 brownish. 



Not much like the male, because of the more extensive yellow markings about 

 the base of the abdomen and the generally browner hue. 



Frons (fig. 242) nearly one-third the width of the head, flat and flush with 



the eyes, greyish yellow with the ocellar triangle 

 and its neighborhood broadly black and the 

 black colour extending back to the occiput but 

 not quite to the eyemargins, shining in places, 

 and bearing on the lower part a large transverse 

 frontal callus which occupies more than one- 

 third the length of the frons, and which extends 

 almost from eye to eye but not quite to the 

 antennae because a doubly arched greyish yellow 

 margin extends across above the antennae, and 

 that colour extends all round the antennae and 

 is connected rather broadly with the fairly broad 

 yellowish middle part of the face ; this latter 

 space widens just before the large shining black 

 united oral callus, which is seldom widely united 

 with the facial calli ; eyemargins narrowly yellow- 

 ish grey and connected with the broad yellowish 

 band which separates the facial from the buccal 

 calli ; buccal calli rather large and shining black 

 but separated from the oral calli by an obscure 

 grey-dusted space. Pubescence on the frons 

 composed of rather abundant pale hairs on the 

 yellowish parts but quite absent near the antenna? ; short scattered dark 

 colored and very sparse pubescence occurs on the middle part of the face, 

 but becomes longer and pale towards the sides, and a similar pale pubescence 

 extends on to the jowls ; back of the head a little puffed out, yellowish, 

 and bearing a short brownish orange fringe near but not on the eyemargin. 

 Proboscis stouter ; palpi longer, lying more against the proboscis and with 

 much less pubescence, which is mainly pale on the sides. Eyes with the 



Fig. 242.. 



-Chrysops ccecutiens 9 • 

 X 14. 



