230 DAVENPORT ACADEMY OF NATURAL SCIENCES. 



Chrysochraon abdominalis, Bruner, 1883. 3rd Rept. U. S. Ent. 

 Com., 55. 



Hab. Montana. 



The types are in the National Museum. The species has not been 

 reported since it was named by Thomas. 



XV. DICHROMORPHA, Morse. Fig. 15. 



Vertex much shorter than broad, somewhat declivent, convex, but 

 more or less sulcate behind the distinct elevated lateral carinae. These 

 are straight or gently curved and meet at an angle of 90 degrees or 

 more in a blunt point. The median carina is entirely wanting, as are 

 the lateral foveolje. The frontal costa is sulcate above and below the 

 ocellus with the sides gently divergent downward, more or less con- 

 stricted just below the ocellus and near the vertex. The face seen from 

 the side is nearly straight. The antenna are a little longer (male) or 

 scarcely so long as (female) the head and pronotum. The disk of the 

 pronotum is plain with the three carinae very nearly straight and paral- 

 lel. All are cut distinctly behind the middle by the very faint princi- 

 pal sulcus. The first and second transverse sulci are not visible upon 

 the disk. The lateral lobes of the pronotum are perpendicular, longer 

 than high, with the anterior and posterior margins strongly oblique, 

 the latter plainly sinuate and the lower margin a little descending pos- 

 teriorly, more strongly ascending and sinuate anteriorly. The lobes 

 of the mesosternum are separated by a space broader than long (female) 

 or as broad as long (male). The lobes of the metasternum are sepa- 

 rated in the female by a space as long as broad, in the male they are 

 contiguous. The tegmina are generally abortive, sometimes well devel- 

 oped, in which case the scapular area is not expanded. The anal field 

 of the tegmina meets the discoidal field at an angle. The posterior 

 femora are stout and not banded. The posterior tibiae are obscurely 

 colored with the apical spurs on the inner side not very unequal. The 

 valves of the ovijjositor are moderately exerted. 



Dichromorpha, Morse, 1896. Psyche, VII, 326, fig. i, 7, 7a, 7b. 



In part, Chlocaltis, Scud., 1862. Journ. Bost. Soc. Nat. Hist., VII, 



445- 



In part, Chlocaltis, Bruner, 1893. Rev. Syst. Orth., 119. 

 In part, Opsomala, Thos., 1865. Trans. 111. Agr. Soc, 451. 

 In part, Chrysochraon, Thos., 1873. Syn. Acrid. N. Am., 75. 

 In part, Truxalis, Stal, 1873. Recen. Orth., I, 92. 



