NO. 1124. REVISION OF THE MELANOPLISCUDDER. 49 



ately retreating; interspace between the eyes rather broad (male) or 

 broad (female), the fastigiuin feebly if at all silicate, the frontal costa 

 distinctly broadest between the antennae, where it is nearly as wide as 

 (male) or still much narrower than (female) the interspace between the 

 eyes, percurrent, sulcate at least below the ocellus; eyes not very 

 prominent nor very large, longer in proportion to breadth in the female 

 than in the male, and yet in the female hardly, in the male distinctly, 

 longer than the anterior infraocular portion of the genae; antennae 

 rather coarse, more than half as long as the body in the male, distinctly 

 longer than head and pronotuin together in the female. Pronotum sub- 

 equal (male) or distinctly and very gradually broadening posteriorly 

 (female), with a rather slight median carina, sometimes interrupted 

 between the sulci, the disk very broadly subtectate, passing by a rounded 

 angle, without forming lateral cariuae, into the vertical (female) or sub- 

 vertical (male) lateral lobes, the front margin subtiuncate, in no way 

 flaring, the hind margin obtusely angulate, the impunctate or very fee- 

 bly rugulose prozona nearly or quite half as long again as the punctate 

 or distinctly rugulose inetazoua, its transverse sulci moderately dis- 

 tinct, that in the middle straight, and followed a third of the way to 

 the metazona by a similar but arcuate sulcus. Prosternal spine blunt 

 conico- cylindrical, more or less retrorse; interspace between mesoster- 

 nal lobes nearly twice as long (male) or half as long again (female) as 

 broad, the inner margins of the lobes nearly straight; metasternal 

 lobes attiugent (male) or subattingeut (female). Tegmina abbreviated, 

 generally but not always a little longer than the pronotuin, rounded or 

 subacuminate at tip, their inner margins overlapping or separated. 

 Fore and middle femora distinctly gibbous in the male; hind femora 

 variable, as also the coloring of the inferior genicular lobe; hind tibiae 

 with nine to ten, generally nine, spines in the outer series. Abdomen 

 of male very feebly clavate, very feebly upturned, the lateral margins 

 of the subgenital plate not ampliate at the base, the apex bluntly 

 angulate at tip, with a distinct but not very large tubercle, extending 

 beyond the inner side of the apical margin ; furcula consisting of a pair 

 of slight, rounded, feebly projecting lobes. 



This genus is closely allied to Hypocklora, but is composed of gener- 

 ally stouter forms, in which the antennae are longer, the pronotuin is 

 usually rugulose rather than punctate, and the males of which have 

 more tumid anterior femora, besides the differences pointed out in our 

 table of genera. 



C. acutipennis may be taken as the type. 



The genus occurs only in the West, where it ranges east of the Rocky 

 Mountains from Nebraska to Texas, and occurs again in Durango, 

 Mexico. 



Proc. X. M. vol. xx 4 



