370 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. XXXII. 



zonal width, slanting, posteriorly scarcely or but very slightly sinuous; 

 lateral and median carina^ absent; prozona broad, broadly convex, cut 

 at the middlje of the anterior half by a T-shaped transverse sulcus, 

 anterior margin broadly rounded, the posterior margin truncate. 

 Prosternum unarmed. Abdomen rounded, not carinate dorsally; 

 ovipositor short, scarcel}' more than three-fourths as long as the 

 posterior femora, curved gently upwards and apically smooth, without 

 serrations; cerci simple, about three tmies as long as the basal width, 

 rapidly and quite gradually tapering to a sharp point in the female, 

 in the male a))out four times as long as the basal width, c\dindrical, 

 blunt apically and furnished in the inner side with a large, naked- 

 pointed, preapical tooth (tig. 55); supraanal plate triangular in both 

 sexes, nearly concealed in the male, more conspicuous in the female, 

 dorsal!}^ sulcate; last dorsal segment roundly sulcate apically in the 

 female and triangularly notched in the male, the projections acute in 

 both sexes; subgenital plate of the male longer than broad, obtuse 

 angularly incised apically and ventro-laterally carinate, the carina3 

 terminating on either side of the apical incision and from their 



extremity arise the short 

 and bluntly terminated 

 apical styles; of the fe- 

 male proportionately 

 much shorter, apically 

 less angularly incised 

 and without lateral cari- 

 nation or apical styles. 

 Wings of both sexes and 

 the elytra in the female 

 aborted, in the male the 

 elytra project bej^ond 

 the pronotum a distance 

 equal to one-half their 

 width. Legs moderately 

 short and stout, anterior 

 coxal spines long and 

 sharp; femora vent rally 

 armed with a few short spines, the anterior and intermediate ones 

 with two or three, usually on the posterior margin only, rarely 

 unarmed; posterior femora parallel on the apical third and armed 

 with a few spines on both margins below, the geniculations blunt, 

 laminate and curved inwards; tibite armed above and below, the 

 anterior ones with a single preapical spine above on the outer mar- 

 giiT in the female but in the male there are sometimes three; the 

 intermediate tibiie generally have four spines on the posterior border 

 above and one or two on the anterior margin; posterior tibiie armed 

 below for three-fourths of their length with small spines placed far 



Figs. 54, 55. — Ateloplus notatus. 54, adult female (after 



ScUDDER). 55, CERCUS OF MALE. 



