NORTH AMERICAN IIOMOPTERA. 255 



o. Head and prothorax smooth, very lightly puiictulate ; head very obtuse, 

 margin from apex to eyes lightly rounded: prothorax with 

 lateral angles distinct, anterior margin not callous, posterior 

 less broad; external half of tegmina free; lobe of prostethinni 

 on each side behind eyes extended downward. 

 6. Ocelli almost etiually remote fix)ni each other and the eyes; border of 

 prothorax from eyes almost continuously to posterior apex yel- 

 low or piccous. not interrupted nariiis Fabr. 



l>b. Ocelli distinctly nearer each other than to the eyes; an obliiiuc lateral 

 line below margin anteriorly, and lateral border b.ehind lateral 

 angles abbreviated posteriorly, yellow ; head with three spots. 



Oclirolouiia Stal. 



rt«. I'rothorax covering all or largest part of tegnsina ; prostetliium on each 

 side behind eyes widened into a distinct lobe: prothorax i)unc- 

 tulate ; body thick ; head very obtuse ; ocelli more remote from 

 the eyes than from each other, occasionally almost double the 

 distance; corium having two longitudinal veins, both forked 

 far from base, two discoidal cells separated by longest basal 

 cell; longitudinal veins forked equally distant from base: 

 tegmina jmrtly free Stictopelta Stal. 



Tribe Aconophorini Godg. 



BB. Posterior prothoracic process touching interior margin of clavus, or its 

 longitudinal vein, very rarely covering apical part of clavus 

 and narrow interior, posterior part of corium ; all or nearly all 

 of tegmina free; corium with two discoidal cells. 

 c. Discoidal cells elongate, nearly equal in length ; prothorax anteriorly with 

 a porrect horn above head, or angulate or horned above lateral 

 angles. 

 d. Prothorax anteriorly strongly elevated, armed above lateral angles with 

 a process directed outwards and sometimes upwards, or angu- 

 lated. 

 e. Prothorax above lateral angles without au inipre-ssion, strongly ele- 

 vated, armed on each side with long horns: posterior process 

 with apex touching clavus, equaling or exceeding apex of teg- 

 mina, back wholly tectiform or ct)mpresso-acute. 



Heniiptyclia Germ. 

 ee. Posterior process of prothorax not touching apex of clavus. 

 /. Ocelli much nearer to each other than to the eyes.. I*y rail the Stal. 

 ff. Ocelli from each other and the eyes almost equally distant. 



g. Front of prothorax highly elevated and greatly declivous, ele- 

 vated part on each side above lateral angles broadened in a long 

 horn or angle; posterior process behind middle sinuate on each 

 side, behind sinus slenderer ; form of prothorax differs in sexes: 

 above lateral angles not or sliglitly imi)ressed. 



Hypliiiioe Stal. 



gg. Front of prothorax convex and sensibly declivous: i)rothorax 



slightly or moderately elevated, aliove lateral angles impressed ; 



above impressions suddenly brcjadcniig in an acute angle or 



short, acute horn T<»iii<»};<»iiia Stal. 



TRANS. AM. ENT. SOC. XIX. SEPTEMHKR, 189:2. 



