BEMBIDIIN.E 61 



apices of the joints beyond the second infuscate; prothorax barely 

 a fourth wider than long, the sides evenly rounded to within a short 

 distance of the base, there rapidly strongly sinuate and parallel 

 thence to the angles, which are right and very sharp; surface with 

 feeble impressions and fine incomplete stria, the foveae sparsely 

 punctate, deep and linear, beyond lateral fifth, the carina obsolete; 

 margins strongly reflexed, finely so apically; elytra fully three-fifths 

 longer than wide and three-fourths wider than the prothorax, sub- 

 parallel, gradually ogival in apical two-fifths; striae rather coarse 

 but barely at all impressed, strongly, rather closely punctate, the 

 sixth obsolete a little behind the middle, the seventh wholly obso- 

 lete; foveae near basal and apical third. Length (9) 6.5 mm.; 

 width 2.5 mm. Arizona (probably southern). One example. 



canonicum n. sp. 



Elytra in great part pale in color, usually variegated somewhat as in 

 erosnm or iistnlatnm 28 



28 Elytra pale testaceous throughout, without darker maculation. 

 Anterior parts polished, black, the neck rufescent; under surface 

 piceous-black, the abdomen in great part rufescent, the legs pale 

 testaceous; head well developed and with prominent eyes, though 

 not quite as wide as an elytron, more than three-fourths as wide as 

 the prothorax, the sulci moderately deep or wide; antennae long and 

 slender, fusco-testaceous, clearer basally; prothorax scarcely more 

 than a fourth wider than long, the sides rounded, oblique in nearly 

 basal half, becoming very moderately sinuate toward the angles, 

 which are barely more than right but sharp and subprominent; 

 surface with very evident transverse impressions and a fine stria 

 between them; foveae nearly smooth, long, deep and linear, the 

 carina obsolete; margins as in the preceding and most others of 

 this section; elytra three-fifths longer than wide and four-fifths wider 

 than the prothorax, broadly ogival in about apical third, parallel, 

 with feebly arcuate sides, rapidly rounded at the humeri; striae un- 

 impressed, feebly so suturad; punctures strong, separated by their 

 diameters, smaller and close in the sutural striae; sixth stria extend- 

 ing three-fifths, the seventh completely wanting; foveae near basal 

 and before apical third. Length (cf) 6.8 mm.; width 2.65 mm. 

 Utah (St. George), Wickham. Two exactly similar specimens. 



retectum n. sp. 



Elytra pale testaceous, angularly dark at the scutellum and with a bi- 

 oblique paler subapical fascia, which is bordered anteriorly by a 

 nubilous dark fascia, the apex behind the pale fascia also blackish. 

 Anterior parts black, with subaeneous lustre, the neck pale at base; 

 under surface black, the abdomen feebly paler at apex, the legs tes- 

 taceous; head and antennae nearly as in the preceding, the eyes not 

 quite so large; prothorax shorter, two-fifths wider than long, the 

 sides strongly rounded, less so and oblique behind, becoming parallel 

 for a very short distance from the angles, which are right, sharp and 

 slightly prominent; surface nearly as in the preceding, the carina, 

 however, sometimes distinct though fine; elytra one-half longer than 

 wide and fully one-half wider than the prothorax, gradually obtusely 



