AMERICAN COMPONENTS OF THE TENTYRIINtE 3OI 



to the humeral angles, the sculpture nearly as in cxtcnsiim^ except 

 that the punctures becoine much coarser, denser and confused 

 above the humeri for a short distance from the base ; abdomen 

 feebly rugulose, finely, sparsely punctate medially. Length 8.0- 

 8.5 mm.; width 3.3-3.4 mm. Arizona (southern), Morrison. 



dubium Csy. 



Form rather less elongate and very slightly more convex than in the 

 two preceding species, black, the under surface piceous, the legs 

 and antennte rufous, polished ; head almost three-fifths as wide as 

 the prothorax, rectilinearly and broadly truncate, the sides mod- 

 erately converging and strongly arcuate, the punctures coarse, 

 deep and very close, generally separated by less than their own 

 widths, the occipital spot more or less small but well defined; 

 prothorax less transverse, three-fourths wider than long, the sides 

 variably but moderately arcuate, the disk widest from behind to 

 somewhat before the middle, the basal angles ol:)tuse, not at all 

 blunt or prominent; punctures rather coarse, deep, moderately 

 sparse, becoming gradually coarse, dense but only slightly con- 

 fluent in about lateral fourth; scutellum well developed ; elytra 

 one-half to slightly more, longer than wide, very obtusely ogival 

 at apex, about a sixth wider than the prothorax and thi-ee and one- 

 half times as long, the sides feebly rounding to the humeri basally, 

 the humeri evidently exposed at base, the punctures nearly as in 

 dubium but rather less confused, though becoming coarser, above 

 the humeral callus; abdomen finely, moderately sparsely punc- 

 tured medially. Length 8.2-8.6 mm. ; width 3.3-3.5 mm. Ari- 

 zona (Phoenix) phoenicis n. sp. 



22 — Elongate, rather strongly convex, polished, black to rufous, the 

 legs and antennas paler, rufous; head moderate, transversely 

 truncate, the sides only feebly converging and moderately arcuate, 

 not becoming quite parallel toward the eyes, the punctures coarse, 

 deep, even, distinctly separated, the occipital smooth spot irregu- 

 lar and ill-defined ; prothorax fully three-fourths wider than long, 

 the sides rather strongly arcuate, more converging, straight and 

 with the edge just visibly serrulate anteriorly, the basal angles 

 more or less minutely and feebly prominent; punctures rather 

 coarse, deep, moderately separated, becoming more or less grad- 

 ually coarse and dense laterally; scutellum moderate; elytra 

 more than one-half to nearly three-fifths longer than wide, evi- 

 dently wider than the prothorax and about -^three and one-half 

 times as long, obtusely ogival at tip, the punctures moderately 

 coarse and close-set in series laterally, alternating with the more 

 widely spaced and somewhat larger uniserial punctures of the 

 intervals; abdomen finely, sparsely punctate medially. Length 

 6.8-7.4 mm. ; width 2.9-3.2 mm. Arizona (Nogales), — H. F. 

 Wickham hebes n. sp. 



Elongate and rather less convex, brownish-rufous in color, shining; 

 head rather well developed, truncate, the sides only moderately 



