EXOPEOSOPA. 203 



152. Exoprosopa insulata, Walk. (PI. Ill, fig. 4.) 



Anthrax (s. g. Litorhi/nchus) insulata, Walker, Ins. Saund., Dipt. 

 pt. iii, p. 11-2 (1852)'. 



, Brunetti, Rec. Ind. Mas. ii, p. 440 (1909). 

 Head with frons about half as wide again above antennae, where 

 it forms one-third the width of the head, as at vertex ; dull olive- 

 brown (in well-preserved specimens, otherwise blackish), with black 

 pubescence and minute elongate pinkish-yellow scales or scale-like 

 hairs ; face concolorous, but yellowish about the mouth-opening, 

 with similar hairs and small scales ; proboscis black, projecting 

 some distance beyond tip of antennae ; antennas black ; occiput 

 dark grey, with very small yellow scales in the neighbourhood of 

 the eye-margins, hinder edge with a fringe of short yellow hairs. 

 Thorax dark olive-grey or olive-brown (in perfect specimens), 

 with short black pubescence and very minute elongate yellow 

 scales, which perhaps are sparser about the centre of the dorsum ; 

 anterior margin with long brownish-yellow scales, which are also 

 fairly abundant from below the shoulders to below the wing-base, 

 and, again, below the posterior corners of the dorsum. Lower 

 part of prothorax, the mesojileurge, pteropleurae, and sternopleurse 

 with long black bristly hairs; scutellum concolorous with thoracic 

 dorsum, with small yellow scales and a few black hairs, arid a row 

 of rather sinuous thin black hairs on posterior margin. Abdomen 

 rather dull black, slightly shining: 1st segment with a bunch 

 towards each side of comparatively short, very erect, elongate, 

 brownish-yellow scales, and a narrow band of such erect scales 

 extends across the segment on the anterior half ; 2nd segment 

 with broad band on anterior half of small elongate closely-applied 

 yellow scales, the posterior half being covered with black scales of 

 similar nature ; 4th and following segments with similar black 

 scales on anterior part and yellow scales on hinder part ; 4th seg- 

 ment with a pTitch of silvery-white scales towards each side, and 

 7th segment mainly covered with such scales ; sides of abdomen 

 with long brown scales and long black hairs ; venter black, with a 

 little black pubescence and covered with minute yellow scales. 

 Legs black ; tibiae more or less dark brown ; femora with small 

 closely-applied pale scales, posterior femora and tibiae with the 

 usual bristles. \Vin(/s pale grey, with a broad oblique dark brown 

 or blackish-brown band extending on the costa to tip of 1st longi- 

 tudinal vein, and distinctly beyond bifurcation of 2nd and 3rd 

 veins, and anterior cross-vein, embracing basal third of discal cell 

 and crossing anal and axillary cells about their middles ; several 

 blackish spots are present, variable in number and size, four on 

 the clear part of the wing being always present, placed respec- 

 tively (l)near tip of 2nd vein, (2) at fork of 3rd vein, (3) on 

 2nd "vein at the junction of the veinlet joining this vein to the 

 3rd, and (4) over outer side of discal cell, generally elongate and 

 sometimes reduced to two separate spots ; on the brown part of 

 the wing, the spots being much darker in colour, there are 

 generally one over the anterior cross-vein, one at the fork of the 



