PANTOMORUS OF AMERICA NORTH OF MEXICO 37 
subplanate to feebly concave, median groove finer than in candidus; eye rather 
strongly convex in both sexes, a little more convex in female, outline usually 
subcircular in both sexes, sometimes slightly elliptical in male; scape hardly 
exceeding eye, funicular segments 1 and 2 usually subequal. Prothorax wider 
than long (average for both sexes about 7 to 6), a little longer, relatively, in 
male, slightly to rather strongly rounded laterally, more strongly so in male, 
usually plainly narrowed basally in both sexes; pronotum rather strongly convex 
longitudinally in male, more feebly so in female, verrucose to rugo-verrucose, 
the radial clusters of scales usually more numerous and more clearly isolated 
than in candidus, median groove present, basal margin subtruncate to feebly 
bisinuate, basal groove (with scales in place) indistinct in most specimens, 
hind angles obtuse to acute, often slightly prominent. Scutellum small to rather 
large, densely scaly. Elytron not, or faintly, thickened at basal margin, 
humerus subangulate, intervals slightly convex, the alternate (odd) ones often 
a little wider and usually with more setae than the even, the first one sometimes 
slightly prominent basally, each interval in female usually with an irregular 
double row of setae, in male with a single, or only partly double, row; setae 
conspicuous, the longer ones nearly or quite equal to the width of an interval. 
Metepisternum distinct; abdominal vestiture sparser medially in male, subevenly 
distributed in female; sternite 5 shallowly emarginate at apex in female, broadly 
subtruneate in male, sternite 2 of male usually with three or four larger, and 
often one to several minute, denticles, the larger ones sometimes formed by the 
fusion of two or more smaller denticles, the denticles, as in candidus, irregular 
in shape and size and often asymmetrical in placement. Fore tibia with 5 to 9 
rather strong denticles, middle and hind tibiae of male with a few smaller ones, 
middle tibia of female with a few denticles. Median lobe gradually widened 
basally (fig. 4, K). 
Type locality—Colorado (Pueblo). 
Distribution.—Colorado (Pueblo and Fort Collins) ; New Mexico; 
western Kansas; Nebraska (McCook); Montana (Otter Creek, one 
female from stomach of toad Bufo woodhousti, No. 165, Biological 
Survey). 
Type.—Female, and 65 paratypes, male and female, Cat. No. 52801, 
United States National Museum. Paratypes in Academy of Natural 
Sciences at Philadelphia and in Carnegie Museum at Pittsburgh. 
Described from 66 specimens, most of them from Colorado. 
The type is labeled “May 18, Collection H. Soltau.” Most of the 
Colorado specimens were collected in April and May, a Nebraska 
specimen on May 22, and the Montana specimen on June 28. 
In most cases the male has the elytra relatively narrower and the 
prothorax more inflated laterally than in the female. In a few 
females the sides of the prothorax are subparallel in the basal half, 
about as in candidus. Occasionally the first funicular segment is 
slightly longer than the second, and sometimes the reverse is true. 
The emargination of the apex of abdominal sternite 5 of the female 
varies in width and depth. A minute forking of the tips of some of 
the elytral setae has been observed in several specimens but appar- 
ently is of less frequent occurrence than in obscurus. The series from 
Pueblo, Colo., consists of specimens somewhat smaller than the aver- 
age, having the pronotal scales more generally arranged in radial 
clusters on the small tubercles and the tubercles appearing to be more 
distinctly isolated than in most specimens from other localities. A 
few specimens from Fort Collins, Colo., are larger and darker than 
usual. In a Pueblo male the median lobe proper is moderately wid- 
ened basally, and as long as a median strut, whereas in a male from 
Fort Collins the median lobe is about one-third longer than a median 
strut, and the base more abruptly widened, in this latter respect 
approaching the shape seen in candidus. In a male from western 
Kansas the median lobe proper is only a little longer than a median 
