578 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.46. 



parallel-margined, over three times as wide as long, not extending in front of eyes; 

 front six-angled, -widest at lower corner of eye, where it is a trifle wider than its median 

 length, two and a half times as wide as at apex, median carina forking at one-fourth 

 its length from apex and regularly diverging until ite forks include over half the width 

 at base; clypeus bearing an acutely tipped, cone-shaped tubercle in front; pronotum 

 transverse, slightly angularly excavated behind ; lateral carinse curving around behind 

 eyes, not reaching hind margin. Elytra about as in Stobaera, obliquely truncate 

 behind, nervures with setigerous tubercles; tarsal spur broad, short, almost spoon 

 shaped. 



Type of germs. — Bostaera nasuta Ball. 



The remarkably broad head, bicarinate front, and the "nose" on the clypeus render 

 this a very distinct and easily recognized genus. 



BOSTAERfcV NASUTA Ball. 

 Bostaera nasuta Bx-Lh '0^:266.— Swezey '0.^:37.— Van Duzee '0,§:200. 

 Locality. — Holly, Antonito, and Fort Collins, Colorado (Ball). 



Genus ACHOROTILE Fieber. 



Frons, notum, and abdomen with numerous round pits; head about 

 as broad as prothorax or slightly narrower, quite strongly carinate; 

 vertex almost square, slightly broadening toward the front (in type 

 species); frons with two median carinse parallel with sides and per- 

 current through apex of head; eyes moderately large, not deeply 

 emarginate below; antennae short, terete, II at least twice as long as 

 I. Pronotum quite long, lateral caringe curved outward behind 

 eyes, not reaching hind margin. Calcar foliaceous, stout; hind 

 tibiae bispinose. 



Type of genus. — Achorotile alhosignata Dahlbaum. 



ACHOROTILE ALBOSIGNATA Dahlbaum. 



Plate 45, figs. L, M, W. 



Delphax fusdn£rvis Scott '77:196. 

 Ditropis albosignata S.'V.hlberg '7i:472. 



Achorotile albosignata Edwards '55:67. — Van Duzee '97:259.— Swezey '0^:42. — 

 OsHANiN '07:334. 



Length of body 3.2 mm.; width of vertex 0.24; width of frons 0.41 ; 

 antennae, I, 0.14; II, 0.28. General color shining black; vertex, 

 dorsum of thorax medially and abdomen on two basal tergites and 

 along median line yellowish browai ; sternum slightly lighter in color. 

 Body not large. 



Head slightly narrower than prothorax, strongly carinate; vertex 

 slightly broader than long, a little broader in front than beliind, pro- 

 jecting a little before eyes, with one or two pits near front margin 

 outside of median carinas; frons oval, almost as broad below as above 

 with median carinae well separated, parallel with sides, confluent at 

 clypeus; with seven pits in each lateral compartment; clypeus convex. 

 Antennae short, not reaching to clypeus, I slightly less than half as 

 long as II, very short. 



