32 
Psyche 
[March-June 
on tarsi. Outer spur of hind tibia broad, flattened; inner some- 
what narrower, also flattened. Rest of spurs slender, spiniform. 
Apparently this is not a very common species. The records 
are from comparatively few specimens. Wickham took it in 
some numbers at Alpine, Texas, however. 
Type: Holotype (?) in LeConte Collection, MCZ, No. 4992 
(examined); type locality: “Frontera, Rio Grande” (New 
Mexico). 
Additional records: in MCZ, USNM, Ohio State, and others. 
Ne\\r Mexico: Separf on Salsola pestifera), Dem ingr Texas: 
Alpine (4400-6000 ft.), Davis Mts. Arizona: Nogales' Willcox, 
Chiricahua Mts., Texas Pass-Dragoon Mts., Phoenix, Kayenta, 
Tucson. 
Pleuropompha tricosta ta sp. nov. 
Black, densely clothed with slightly flattened, pale olive- 
cinereous hairs. Elytra with three strong costse, only one aris- 
ing from the humerus. Costse, raised margin and suture more 
densely pubescent than the intervals but not set off by denuded 
margins and the intervals are also densely pubescent. The 
pubescence is almost uniform over the body, a little more flat- 
tened on the head. A little broader than costata , and averaging 
smaller, twelve to fourteen mm. long. 
Head subquadrate; eyes as in costata but slightly broader. 
Pubescence dense and covering the entire head except for the 
median impressed line, which is not further set off by denuded 
margins. Clypeus and labrum as in costata. Antennae black. 
Male: two and one-half times as long as an anterior tibia, reach- 
ing to the basal fifth of the elytra. First joint reaching to the 
middle of the eye, rather slender. Second slender, two-thirds 
as long as the first; third half again as long as the second; 
fourth and fifth a little shorter. Third to fifth shiny, rather 
slender but increasing in thickness outward. Seventh to last 
short, equal, each being about three-fourths the sixth and to- 
gether equal to second to sixth. Female: first and second joints 
essentially as in the male; third a little longer than the first; 
rest subequal, three-fourths the third and decreasing slightly in 
thickness. Pronotum campanuliform, one-third longer than 
broad. Median impressed line as on the head. Raised areas as 
in costata but without denuded spots. Legs entirely dark brown, 
rather densely pubescent. Outer spur of hind tibia broad, but 
