HYDROMETRID.E. 563 



Underside black witli a sHglit silvery gloss. Antenn(e light 

 browu. Legs light-brown ; thiglis paler beneath ; 1st pair black, 

 yellow beneath, the colour broader and paler on the inner side 

 at the base. 



Head; at the sides a narrow silvery line. AntennceW^i-'hvovjn, 

 the ends of the joints darker ; 3rd extremely minute ; "ith dark- 

 brown. Eyes and Ocelli black. Bostrwn black ; 1st and 2nd joints 

 dusky-yellowish. 



Thorax. — Pronotmn ; the 1st region posteriorly not defined, its 

 middle with a slight yellow keel ; hinder angles raised into a long 

 obtuse tubercle ; disk behind the anterior region in front slightly, 

 transversely crenate ; as far as the hinder angles without a per- 

 ceptible keel, but with a slight, broad, longitudinal depression on 

 each side of the middle ; the undercurved sides posterior to the con- 

 striction, with a yellow line, broad posteriorly, narrow anteriorly ; 

 scutellar process convex, reddish or yellowish-brown in the middle, 

 the colour extending forwards to before the hinder angles, and 

 gradually merged into the darker colour of the disk, posteriorly, 

 generally extended to the apex ; the middle with a slight keel 

 ceasing at the broad, flattened margin. Elytra black-brown, view^ed 

 obliquely with a blueish shade, and sometimes with 2 yellowish 

 streaks ; nerves black, with golden scale-hairs. Wings white, on the 

 anterior margin a rather large, pale, brownish-gray spot. Sternum 

 black with a whitish gloss ; Prosternum yellowish towards the sides, 

 which, seen from above, are bright silvery ; Mesosternum with a fine, 

 shallow, middle channel, deepest in front, and a slight, short, raised 

 line on each sidfe of it diverging backwardly towards the coxa? ; the 

 sides viewed from above dull black bounded by glossy, brassy hairs ; 

 Metasternum in the ($ , with a scarcely perceptible black tubercle. 

 Sheath of the 2nd and 3rd pairs of coxte above black, beneath pale 

 ochreous, margined internally with a black line and the 2nd pair, 

 more inwardly on the mesosternum, with a silvery gray line. Legs ; 

 coxce black above, pale ochreous beneath ; fulcra pale ochreous, with 

 a long black spot in the middle, most perceptible on the 1st pair ; 

 tJiigJis ; 1st pair black with a silvery gloss, the underside brownish- 

 yellow on the apical ^, with a broad black line in the middle ; the 

 basal ^ clear, pale ochreous ; 2nd and 3rd pairs in length subequal, 

 light brow'u, paler beneath ; tibi(e and tarsi brown, merging into 

 black, those of the hinder legs, together, a little longer than the 



