ANTHRAX. 249 



yellow pubescence. Proboscis long, narrow, labella brown ; palpi 

 long, narrow, black, concealed. Eyes with facets equal. Antennae 

 black, basal joints with dense black bristly hairs ; 3rd joint 

 slightly brownish, in the shape of a blunt triangle, tip produced 

 to a long point with a minute apical bristle. Thorax dull black, 

 with dense tawny scaly pubescence, which is thinnest on the disc, 

 the latter bearing numerous adherent black scales and blackish- 

 tawny hairs ; furry pubescence extending from shoulders to wing- 

 base and along dorsal side margins and hind margin ; posterior 

 calli with three to six long yellow spines or bristles, and about 

 five smaller ones above the wings ; a snow-white patch of scales 

 in front of the absolute wing- base, not easily visible; pleurae with 

 dense tawny pubescence, thinner and more greyish on the lower 

 parts. Scutellum with closely-adhering black scales and pale 

 tawny pubescence, a row of black bristles on hind margin, 

 and some small yellow scales towards side margins. Abdomen 

 black, sides of first two segments rufescent ; first four segments 

 densely covered with tawny pubescence, paler and thinner on 

 disc, the whole of which is covered with closely adhering black 

 scales ; side pubescence on 5th and 6th segments deep black ; 

 on 7th snow-white, the middle of the hind margin bearing black 

 scales. Venter black, with closely adhering black scales, and 

 with pale yellow pubescence and some elongate black scales 

 and long black hairs towards side margins ; hind margins of 2nd 

 to 5th segments with some pale scales ; genitalia very small, 

 orange. Legs dull black ; coxae with pale yellow pubescence in 

 front, more brownish behind, and bristly black hairs at tip ; 

 anterior femora with inconspicuous yellowish or blackish pubes- 

 cence behind and beneath, hind femora with such at base only ; 

 pale scales on fore femora in front and behind, on posterior 

 femora nearly over all the surface, and on basal half of posterior 

 tibife and to a less extent on parts of the fore tibiae; pulvilli 

 absent. Wings quite clear or very pale grey, iridescent ; base 

 and fore margin yellowish brown down to 1st longitudinal vein or 

 sometimes a little further, basal parts of veins black or brown ; 

 dense black scales on broadened base of costa, sometimes with 

 some pale ones intermixed ; occasionally a black spine at extreme 

 base of fore margin ; squamae brownish yellow, margin darker, 

 root black, fringe yellow or orange ; halteres small, orange. 



$ . Pubescence 'sparser than in J ; 2nd. 3rd, and 4th abdominal 

 segments with a band of pale scales. Frons at vertex one-eighth 

 the width of the head, fully one-third at level of antennae, Ayith 

 more numerous golden scales than in rf . Silvery patch at wing- 

 base absent. Abdominal pubescence longer; pale tut'ts at tip 

 more yellowish than silvery, pubescence on disc thinner ; a con- 

 spicuous band of golden scales on 2nd, 3rd, and 4th segments, the 

 first one the widest, that on the 3rd segment the narrowest, all 

 the bands narrower in middle ; 6th segment with a narrow hind 

 marginal band of scales, which is sometimes present on the 5th 

 also ; 7th segment with black scales on the disc, and yellow scales 



