ONCOTYLID.E. 391 



posterior margin as long, with 2 more or les3 distinct callosities 

 behind the slightly indented anterior margin, angles rounded ; sides 

 straight ; hinder angles short ; posterior margin straight, slightly 

 rounded towards and at the hinder angles ; disk convex, deflected to 

 the head. Scutelluvi triangular, equilateral, raised above the clavus, 

 with a transverse channel near the base ; anterior portion flattish, 

 deflected to the transverse channel ; hinder portion convex, sides 

 slightly convex. Elytra longer than the abdomen ; Clavus convex, 

 deflected to the corium ; Corium horizontal, convex ; Cuneus longish, 

 triangular, somevrhat broad at the base. Sternum : Prosternum ; 

 xyphus triangular, convex, with a very narrow margin anteriorly ; 

 Mesosternum convex, elevated posteriorly ; posterior margin convex, 

 notched in the middle ; Metasterniim sliglitly convex, margin promi- 

 nent. Legs ; tarsi long; 2nd joint of the 3rd pair longer than the 

 3rd ; 1st more than ^rd the length of the 2nd. 



Sjjecies 1. — Tinicephalus obsoletus. 



Pale greenish- white, clothed with fine, long, silvery- white hairs, 

 which in certain lights appear black or brown. 



Head yellow. AntenncB greenish-yellow, clothed with very short 

 white hairs; 3rd and 4tli joints brownish. Eyes black or brown- 

 black. Bostrum yellowish ; 4th joint black. 



Thorax. — Pronotum pale greenish ; anterior margin and sides 

 paler. ScicteUum, between the base and transverse channel, yel- 

 lowish. Elytra diaphanous, thickly and minutely punctured, and 

 clothed with fine, long, silvery-white hairs, which in certain lights 

 appear black or brown ; Clavus ; inner margin narrowly piceous ; 

 Corium ; anterior margin narrowly greenish ; Cuneus ; anterior 

 margin narrowly greenish or yellowish-green, rounded at the base, 

 and leaving a small but distinct notch ; inner basal angle broadly 

 pale ; Membrane pale fuscous, iridescent ; outer cell-nerve with a 

 darker margin exteriorly ; between the apex of the cuneus and 

 the inner cell-nerve, and from thence to the apex of the anterior 

 margin, 2 brown streaks forming a f -shaped patch; inner mar- 

 ginal nerve piceous ; cell-nerves white ; inner cell blackish at the 

 apex. Sternum greenish-yellow. Leys yellowish, clothed with 

 very short, silvery-white hairs ; tibics with stout, somewhat spinose, 

 black hairs ; tarsi ; 3rd joint, sometimes the apex only, and claws, 

 brown. 



