NO. 1580. THE DECTICIN.E OF NORTH AMERICA— CAUDELL. 291 



ent and little difficulty will be found in theiv separation. ^1. d!(thoJira 

 Sc'udder has the long- posterior femora of Neduha, but the form 

 of the pronotum and the general appearance serve to locate it in this 

 o'enus. 



The armature of the prosternum in this genus is very variable, indi- 

 viduals of the same species varying from unarmed to (juite noticeably 

 spined, the spines always, however, short and blunt. Most of the 

 specimens studied have the prosternum unarmed, very few being notice- 

 ably spined. 



l^hree species of this genus are known. They ma}^ be separated by 

 the following table: 



KEY TO THE SPECIES OF AfiLAOTHORAX. 



A. — Posterior femora of female less than two times as long as the ])r(>notum, of male 



little more than one and one-half times as long; ovipositor moi-e ])ointed, 



apically armed with several, about two dozen, acute teeth. [Adult female of 



.1. ondus unknown.] 



B. — Last abdominal segment of the male triangular, apically rounded ; cerci scarcely 



longer than the basal width; infracercal plates large, together broader than 



the last abilominal segment, the portion beyond that segment two or more 



times as long as broad i)r<(tus, p. 291 



B'. — Last abdominal segmeiit of the male quadangular, apically truncate; cerci 

 two or more times as long as the basal width; infracercal plates smallei", 

 together not as broad as the last alxldininal segment, the portion beyond 



that segment about as long as broad caMdiicns, p. 2M3 



A'. — I'osterior femora of female, male unknown, more than twice as long ns the 

 pronotum; ovipositor less pointed, armetl at tlie tip with a few, al)out one 

 dozen, blunt serrations diaboUcuff, p. 294 



AGLAOTHORAX OVATUS Scudder. 



TropiznKpis orata Scudder, Proc. Amer. Acad. Arts Sci., XXXV, 1899, pp. So, 

 84; Cat. Orth. U. S., 1900, p. 77— Woodwortji, Bull. Xo. 142, Calif. Exp. 

 Station, 1902, p. 15.— Kirby, Syn. Cat. Orth., II, 1906, p. 191. 



DcHcrlptioii. — Male, adult female unknown. Head of medium size, 

 well inserted into the pronotum; vertex about one-fourth as broad as 

 the interocular space, apically shallowly cleft; front Hat, very little 

 convex. E3^es small, round, moderatel}" prominent, and dark l)rown 

 in color. Antenna^ nnich longer than the bod}^ the basal segment about 

 as l)road as one of the e3"es. Pronotum excessivel}- large and posteriorly 

 produced far over the base of the abdomen, covering the wings; lateral 

 lobes well developed, nearly vertical, twice as long as high, the pos- 

 terior border scarcely sinuate; lateral carina' sharp, except near the 

 anterior border, from which point they curve gradually outward, 

 making the disk an oblong oval, semicircularly rounded behind and 

 truncate l)efore, the disk ver}^ gently convex with very obscure ]>ut 

 persistent median carina. Prosternum unarmed or armed with mod- 

 erately distinct spines, rarely at all sharp or conspicuous. Abdomen 

 scarcely longer than the pronotum and much narrower, except in young 



