ClCINDELID^E AND CARABID^ l6l 



Differs from the following species in its more slender and more 

 depressed form, more elongate and more opaque elytra, wholly 

 impunctate striae, more distinct basal transverse thoracic impression, 

 more slender antennae, less broadly dilated anterior tarsi of the male 

 and in the form of the mentum tooth. 



Pristodactyla zuniana n. sp. Form rather stout, rather convex, deep 

 black, polished, the elytra densely alutaceous; legs throughout piceo- 

 rufous, the antennae dark testaceous, the basal joint but little darker; 

 head rather large, fully two-thirds as wide as the prothorax, the antennae 

 moderately long and slender; prothorax large, slightly shorter than wide, 

 formed as in the preceding, except that the deep and similarly posteriorly 

 bifurcate sublateral impressions near the base are not connected by the 

 transverse impression, this being very feeble and not anteriorly angulate 

 at the middle, the anterior transverse impression obsolete or barely trace- 

 able; base not truncate as in arizonica but broadly and feebly sinuate; 

 elytra oblong-oval, about one-half longer than wide, only two-fifths wider 

 than the prothorax, with parallel, broadly arcuate sides and obtuse apex, 

 the striae fine, scarcely at all impressed, finely, very distinctly punctate 

 throughout, with the usual two to three small foveae, the intervals almost 

 perfectly flat. Length (cf) 10.4-11.8 mm.; width 4.2-4.5 mm. New 

 Mexico (locality unrecorded). 



Both the above species differ from dubia Lee., in having the pro- 

 thorax less narrowed at base, the base in dubia being only about 

 two-thirds as wide as the apex, also in the deeper latero-subbasal 

 thoracic impressions; the transverse impressions in zuniana are 

 much feebler. The mentum tooth in dubia is said to be narrow, 

 with its tip very slightly emarginate. In arizonica the tooth is 

 broad, subparallel, with its apex broadly and obtusely bilobed and 

 its surface is equally and strongly canaliculate medially throughout 

 the length. In zuniana it is more trapezoidal, with the two lobes 

 of the apex pointed and the strong medial emargination angulate 

 and continued posteriorly on the surface by a posteriorly and rapidly 

 attenuate impression. The very distinctly punctulate elytral striae 

 of zuniana would undoubtedly have been observed by LeConte if 

 present in dubia, the length of which is given as 12 mm. 



*Pristodactyla semirufa n. sp. Small, rather slender, moderately 

 convex, pale testaceous in color and polished, the elytra more obscure 

 testaceous and faintly alutaceous; head large, fully three-fourths as wide 

 as the prothorax, the antennae only moderately slender, pale testaceous 

 throughout; prothorax small, convex, nearly a fifth wider than long, the 

 sides rather strongly arcuate throughout, a little more converging basally, 

 with broadly rounded angles and rectilinearly truncate base, which is 



T. L. Casey, Mem. Col. IV, Oct. 1913. 



