H. C. FALL 433 



Prothorax moderately transverse, not much narrowed in front, sides rather 

 strongly rounded, widest but Uttle behind the middle, M heavily marked, 

 extending from base to apex, punctuation close in the darker areas, elsewhere 

 sparse, sides smoother. 



Elytral punctuation confused in scutellar region, striate at sides and rear, 

 striae five to six more or less confused medially, shield small and inconsi)icuous, 

 marginal interspace without punctures, standard spots all evident as a rule, 

 the anterior one of the inner series sometimes obsolete. 



Pygidium black with the typical yellow spots. Body beneath, except ab- 

 dominal apex, blackish. Femora blackish brown in basal two-thirds, a little 

 paler at extreme base, yellow in apical one-third; tibiae pale, with more or less 

 evident median darker shade. 



Length 2.35 to 3 mm.; width 1.3 to 1.6 mm. 



Distribution. — Arizona: Xogales, Aug. and Sept. (Xunenmacher), type, 

 male; Williams, June 30 to July 28 (Barber & Schwarz); July 19 (Wickham). 



This species is closely allied to precarms, which see for a state- 

 ment of differences. 



114. Paehybrachys croftus Bowditch 



Black and 3'ellow, variegated, the black prone to predominate; 

 integuments usually minutel}^ alutaceous but with the elytra at 

 least somewhat shining, sometimes strongly so; frontal marks 

 heavy, thoracic M broad, leaving two elongate basal spots, a 

 narrow side margin, sometimes broader in front, and usually a 

 narrow median anterior line, yellow; elytral spots sometimes fairly 

 distinct, but usually — especially the inner series — much suf- 

 fused, those at the rear transversely confluent. Eyes rather 

 widely separated, front without ocular lines, front claws of male 

 scarcely larger than the others. Ave. length 3 mm. Colorado 

 to Arizona. 



Head densely punctate except in the usually small pale areas. Ej-es sepa- 

 rated by one and two-thu'ds to one and three-fourths times the length of the 

 basal joint of the antennae in the male, and by twice the length of the basal 

 joint or slightly more in the female. Antennae fully three-fourths the length 

 of the body in the male, the tenth joint three times as long as wide, outer joints 

 blackish as usual. 



ProtJiorax widest and broadly subangulate at about the basal two-fifths, 

 moderately narrowed in front, feebly sinuate before the basal angles, densely 

 pimctate, side margins narrowly smooth, black markings always heavy. 



Elytra broadly confusedly punctate in baso-sutural triangle, striae variable, 

 moderately impressed, the two outer ones entire, the others evident on the 

 rear convexity and often with one or two at the middle of the disk fairly well 

 defined throughout; marginal interspace impunctate behind the middle; shield 

 wanting. 



TRAXS. AM. EXT. SOC, XLI. 



