H. C. FALL 317 



Prothorax less finely and more densely punctate. 



Size rather large (3.5 to 4 mm.); black markings heavy and more or 

 less broadly suffused. 

 Antennae with 10th joint (cf ) less than 3§ times as long as wide. 



(Arizona.) [Species doubtfully placed.] 75. notatus 



Antennae with 10th joint (cf ) four times as long as wide. (Arizona; 



CaUfornia.) 119. pinguescens* 



Size moderate (2.5 to 3.2 mm.); color i)redominantly yellow (except 

 rarely in caelatus). 

 Eyes separated by fully twice the length of the basal antennal joint 

 in the cf , and by nearly the entire length of the eye in the $ ; striae 



nearly regular. (Texas to Cahfornia.) Tti. caelatus* 



Eyes separated by much less than twice the length of the basal anten- 

 nal joint in the o"^, and much less than the length of the eye in 

 the 9 . (Texas.) 77. brevicollis 



22. Front with ocular lines 23 



Front with ocular lines faintly indicated and quite near the eyes; markings 



black, variable; elytral striae generally ill-defined and feebly impressed; 

 front claws rather strongly enlarged. (California to Colorado.) 



85. vacillatus 

 Front without ocular lines 26 



23. Elytral punctuation largely confused, striae at sides and rear very irregular 



or fragmentary; markings brown and diffuse, a posterior fascia some- 

 times conspicuous; ocular lines often feeble or subobsolete. (Texas to 



Arizona.) 84. postfasciatus 



El^^tra more or less distinctly striate at sides and rear 24 



24. Punctures and markings of upper surface brown or rust colored, sometimes 



becoming blackish on the elytral disk in the cf ; eyes in the cf separated 

 by a httle less than twice the length of the basal antennal joint. 



Elytral striae much confused, only one or two outer striae and the api- 

 cal portions of the discal ones well defined; ocular lines quite near the 

 eyes; marginal interspace of elytra numerously punctate, size larger 



(3.2 to 3.5 mm.). (California.) 78. nubigenus 



Elj'tral striae fairly regular from base to apex in more than outer half; 



ocular lines distant from the eyes; marginal interspace of elytra with 



very few punctures; size smaller (2.5 mm.). (California.) . 79. punicus 



Punctures and markings of upper surface entirely black or fuscous in 



mature specimens (except possibly in some examples of signatus) 25 



25. Front claws of c^ distinctly enlarged, perceptibly so in the 9 ; eyes in the 



cf separated by barely twice the length of the basal antennal joint. 



(Maine to British Columbia.) 81. peccans 



Front claws of cf only shghtly larger, scarcely so in the 9 ; eyes of c'' sepa- 

 rated by fully twice the length of the basal antennal joint. 



Markings very variable in development; front claws of cf a little more 



obviously enlarged. (Pacific States.) SO. melanostictus 



Black, yellow markings few and small; front claws of o' \ery little en- 

 larg(>d. (California.) 82. signatifrons* 



TRANS. AM. EXT. SOC, XLI. 



