332 TABANIDiE 



as deep, clotlied with rather dense though not very conspicuous moderately 

 long pale brown pubescence, which appears in some lights to be almost 

 whitish, and this pubescence becoming more sparse on the lower and 

 hinder parts. Eyes in life (fig. 221) brown with a slight greenish tinge 

 on the large facets which occupy the upper two-thirds, then with an 

 obscure narrow dark band all across, and below that with two zig-zag bands 

 which are brilliant green with a faint coppery tinge, and which leave three 

 almost isolated brownish purple spots against the dark middle line, and a 

 narrow brownish purple band between the two green ones which has two deep 

 dentations on the front half but becomes wider and not 

 indented on the hind half, while the lower third or more of 

 this colored part is brown and has two moderate dentations 

 on the front half : all the dark bands narrowly unite on 

 the hindmargin ; facets large except on the lower (or appar- 

 ently outer) third and for a short zone extending about half- 

 way up the back part. Antennse (fig. 213) hardly one and 

 a half times as long as the head ; basal joint dilated, 

 elongate ovate, quite twice as long as deep, almost or 

 quite as long as the third joint, shining black but with 

 Fio, 221^.— Hmnatopot a obvious grey dust about the base extending on the inner 

 Left eye in life. side for slightly more than the basal half, and bearing all 

 over long not dense pubescence which may be all black 

 or may be pale on the underside ; second joint very short cup-shaped but pro- 

 jected dorsally a considerable distance over the third joint,* black, and bearing 

 a shorter denser black bristly pubescence ; third joint annulated, with its basal 

 segment longer than the other three together and usually rather lurid reddish 

 orange, and this segment stoutest about its middle but nearly three times as 

 long as the width of its stoutest part and with a number of short black decum- 

 bent dorsal bristles a little before its middle and some more beneath which 

 seem to indicate a circlet around what might be a further subdivision of 

 the segment • the other three segments of the third joint form a dull blackish 

 brown cylinder. 



Thorax dull brownish black with three narrow widely separated grey lines 

 commencing quite from the front, of which the middle one is very narrow but 

 extended right through to the scutellum, but the side ones not quite so 

 narrow and interrupted at the suture and often extended for only a short 

 distance after the suture but on the other hand often extended more or less 

 distinctly to the hindmargin, and sometimes forming inconspicuous wider grey 

 spots just after the suture ; outside these lines the sides of the disc of 

 the thorax are less distinctly greyish, and the prsealar call! are distinctly 

 greyish ; postalar calli and their neighborhood greyish or brownish grey ; 

 pubescence long and moderately abundant, mainly composed of rather sloping 

 yellowish grey hairs, but with numerous inconspicuous more erect black hairs 

 intermixed. Pleurae dark ashy grey, with long and shaggy greyish yellow 

 pubescence which is sparse on the lower part and which includes a patch of 

 black hairs on the back part of the mesopleurte, while the pubescence on the 

 back part of the pleura3 is more yellowish and less grey. Scutellum dark 

 grey, and bearing long almost erect black and greyish yellow hairs intermixed. 

 Abdomen dull black, with the hindmargins of the segments (after the 

 basal one) ferruginous or grey and the sides of the three basal segments 

 (especiallj^ the second and third) brownish red ; the normal coloring has 

 greyish hindmargins which tend to widen into triangles at the middle, especi- 

 ally from the fourth segment onwards, and on that fourth segment the traces 

 may l^egin of a grey dorsal line and a roundish grey spot on each side of the 

 dorsal line rather above the middle of the segment ; a similar dorsal line and 

 rounded grey spots become more distinct on the fifth and sixth segments, 

 until on the sixth segment only the sides and two rather large spots remain 

 blackish brown, and the short seventh segment shows mainly a greyish 

 hindmargin ; but in darker specimens there may be but little trace of the 

 grey dorsal line or side-spots ; the brownish red at the sides about the base 

 seems to be always distinct on the second segment but may be diminished in 

 amount on the first and third segments. Pubescence suberect, long but not 



* This is not perceptible from the point of view in Fig. 214. 



