48 Annals of the Carnegie Museum. 



two others are now added. All of these may be separated by the 

 subjoined synoptic table. 



Synopsis of the Species of Diedronotus. 

 A. Crest of the pronotum more or less crenulate, or even serrulate, posteriorly. 

 Genicular angles of the hind femora acute, a little lengthened. 

 b. Tegmina and body cinereous, testaceous, or ferrugineous, usually, but not 

 always, more or less mottled or streaked with brown or fuscous. 

 c. Markings of the tegmina either large and forming more or less well-defined 

 bands, or else showing as longitudinal lines along the principal 

 veins. 

 d. Hind tibiae twelve-spined. The anterior field as well as the disk of 

 the wing chiefly rose-color. [U. S. of Colombia.] 



rosulentus Sta.1. 



dd. Hind tibiae nine- to eleven-spined. The anterior field of the wing 



more or less completely infuscated. 



e. Hind femora very long, reaching considerably beyond the tip 



of the abdomen in both sexes. Crest of the pronotum 



deeply cleft by all three sulci, the lobes distinctly separated- 



discoideus Serville. 

 ee. Hind femora shorter, only reaching the tip of the abdomen (?) 

 or but little surpassing it (o 71 ). Crest of the pronotum less 

 deeply cleft, the lobes at least closely approximate. 

 /. Tegmina moderately slender, the apex quite obliquely trun- 

 cate, in some instances decidedly acuminate. 

 g. Maculation of tegmina typical, consisting of several 

 transverse bars and large blotches and distributed 



over most of the wing angulatus Stal. 



gg. Maculation of tegmina almost or quite wanting. 



h. Size small. Tegmina and wings but little surpassing 

 the apex of the abdomen. General color of the 

 tegmina testaceo-ferruginous, marked on basal half 

 with a large triangular spot. [Cordoba, Argentina.] 



schulzi Bruner. 



hh. Size large. Tegmina long, slender, acuminate, pale 



cinereous, the infuscation of tegmina confined 



chiefly to the longitudinal veins. [Western Brazil 



and East Peru.] strigalus sp. nov. 



ff. Tegmina unusually wide. 



g. Pronotal carina high and strongly arched, wings not 

 especially infuscated. [Yucatan and Honduras.] 



mexicaniis Bruner. 



gg. Pronotal carina of moderate elevation, not strongly 



arched; wings strongly bordered with deep fuscous. 



[Montevideo.] fuscipennis sp. nov. 



cc. Markings of tegmina small, irregularly scattered over the wing, save for a 

 row in basal half of the discal area. 



