ONCOTYLID.E. 391 



posterior margin as long, with 2 more or less 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. Scutellum 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, somewhat 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 ; Metasternum slightly 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. . 



Species 1. TINICEPHALUS OBSOLETUS. 



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

 which in certain lights appear black or brown. 



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

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

 black. Rostrum yellowish ; 4th joint black. 



Thorax. Pronotum pale greenish ; anterior margin and sides 

 paler. Scutellum, 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. Legs yellowish, clothed with 

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

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

 brown. 



