222 GEO. H. HORN, M. D. 



Male. — Fifth ventral slightly emarginate at middle, sixth more deeply and 

 broadly emarginate, wider than the last dorsal, broader than long, narrowed to 

 tip, apex broadly emarginate and with the angles obtuse. (PI. I, fig. 1). 



Female. — Filth ventral semicircular, flattened at tip, last dorsal semicircular 

 with the margin slightly reflexed. 



Occurs at Santa Fe, New Mexico. Utah, (Ulke). The 9 from 

 Utah is the larger, and has the testaceous space reduced to a large 

 irregular blotcli on each elytron. 



C piinoficollis. Bland. — Piceous, moderately shining, legs and antennae 

 browni^ii, surface s])arsely pubescent. Head sparsely jiunctured, eyes moder- 

 ately prominent. Antennae half the length of body, joints two, three and four, 

 obconieal, equal, each much shorter than any of the followin'z joints, five to 

 ten equal, eleven somewhat longer. Thorax one- fourth longer tlian wide, base 

 narrower than apex, feebly constricted in front of middle, strongly compressed 

 at sides behind, disc moderately convex, very sparsely and finely punctured, a 

 feeble ante-scutellar impression; color piceous, basal and apical margins paler. 

 Scutellum cordiform, base with feeble notch. Elytra nearly twice as wide as 

 base of thorax, humeri distinct, sides nearly parallel, apices cimjointly rounded, 

 disc moderately convex, with rows of coarse quadrate punctures becoming 

 gradually finer posteriorly, and at apex nearly obliterated, intervals with a row 

 of fine but distant punctures; color piceous brown with narrow ante-median 

 yellow fascia, frequently interrupted at suture and margin, becoming a central 

 spot. Body beneath very minutely and sparsely punctulate, somewhat paler 

 than above, legs ferruginous brown, femora darker at middle. Length .14— .22 

 inch ; .3.5 — 5.5 mm. 



Male. — Fifth ventral arcuate, sixth short, broadly emarginate, as broad as 

 the last dorsal but much shorter, the latter semicircular with a feeble notch at 

 middle. (PI. I, fig. 2). 



i^ema/e.— Fifth ventral truncate, sixth short, rounded at tip, last dorsal 

 semicircular. 



Occurs from western Texas, through Arizona to Fort Yuma, Cali- 

 fornia, thence through the peninsula to Cape San Lucas. This is the 

 smallest .species in our fauna and relatively, with coarser elytral punc- 

 tures, the intervals between them being very much narrower than the 

 punctures themselves. 



C Xanfi, n. sp. — Form moderately robust, pale castaneous, moderately 

 shilling, sparsely pubescent. Head finely punctured, eyes moderately convex. 

 Antennae barely attaining the middle of the body, second joint short, half' the 

 length of third, which is but little shorter than the fourth, five to ten equal, 

 subserrate, eleventh longer, acute. Thorax one-fourth longer than wide, wider 

 at afiex than base, moderately compressed behind the middle, no ante-scutellar 

 impression, surface finely and sparsely punctate. Scutellum broadly oval, 

 feebly emarginate at tip. Elytra nearly twice as wide as thorax at base, 

 humeri distinct, sides parallel, tips conjointly rounded, disc slightly flattened 

 and with strife of coarse punctures gradually becoming finer to apical fourth 

 where they become obsolete, intervals rather broad and with one row of fine, 



