366 AMERICAN PACHYBRACHYS (cOLEOPTERA) 



shield distinct; eighth stria sinuous, dislocated behind the humei-us, marginal 

 interspace impunctate; standard spots incompletely and vaguely indicated, 

 the median lateral spots wanting, the posterior spots coalescent. 



Pygidium brown and whitish yellow. Body beneath brown, abdominal 

 apex pale. Legs pale with hght brown femoral spots or shades. 



Length 2.25 mm.; width 1.2 mm. 



Distribution. — Arizona: Hot Springs, June 27 (Barber & Schwarz). The 

 unique male type is in the National Museum Collection. A female from 

 Tucson, Ariz., April 21 (Hubbard & Schwarz Coll.), is doubtfully associated. 

 In it the eyes are separated by the length of the basal antennal joint; the 

 lateral interspace of the el>^ra is sparsely punctate, the yellow color is brighter 

 and the form seems a bit more elongate; length 3 mm. 



49. Pachybrachys alacris new species 



Rufo- to flavo-testaceous, finely alutaceoiis, the thorax scarcely, 

 the elytra feebly shining; standard spots brown, small and feebly 

 indicated; elytra distinctly striate; eyes (9) separated by not 

 more than three-fourths the vertical width of their upper lobes; 

 front claws of male probably not appreciably larger. Ave. length 

 3.15 mm. Arizona. 



Head evenly not very densely punctate, markings obsolete; ocular hnes 

 feebly indicated, very fine and close to the eyes. Eyes ( 9 ) separated by a 

 little more than the length of the rather small basal antennal joint. Antennae 

 (cf ) scarcely passing the humeral mnbo, the tenth joint twice as long as wide, 

 outer joints dusky. 



Prothorax moderately transverse, widest at basal fourth or third, sides 

 broadly arcuate, moderately convergent in front; punctures not dense, uneven, 

 rather sparse except in the small and rather indistinct darker markings; 

 smoother along the side margins. 



Elijtra confusedly punctate in the baso-sutural triangle, elsewhere with 

 fairly regular impressed striae, the fifth and sixth broken or confused at middle; 

 eighth stria dislocated near the base; marginal interspace impunctate; shield 

 elongate, distinct; standard spots feebly indicated. 



Pygidium predominantly pale. Body beneath blackish brown, the sides 

 of the abdomen and the last ventral segment in great part pale. Legs rufo- 

 testaceous, with feeble or obsolete femoral clouds. 



Length ( 9 ) 3 to 3.25 mm.; width 1.5 to 1.6 mm. 



Distribution. — Arizona: type ( 9 ) without definite locality; a second female 

 from San Bernardino Ranch, Cochise Co., 3,750 ft. (E. G. Smyth in Knaus 

 Coll.). 



This species bears a general resemblance to calidus, but is more 

 obscurely marked and with more approximate eyes, the latter 

 being as close in the female of alacris as in the male of calidu.s. 

 The ocular lines are more distinct in calicbis, ])arely detectable 

 in alacris. 



