H. C. FALL 325 



Size smaller and less robust, pale markings \-ellow. (Pacific Coast 

 species.) 12 



12. Front claws of cf very little or scarcely larger than the others 13 



Front claws of cf quite conspicuously enlarged 14 



13. Sides of prothorax narrowly smooth, yellow markings fretjuently con- 



spicuous 117. lustrans 



Sides of prothorax closely jjunctured to the extreme margin, yelldw niaik- 

 ings almost wanting S2. signatifrons* 



14. Sides of prothorax distinctly' smooth or subimpimctate along the margin, 



strongly rounded in both sexes; last ventral segment with yellow marks. 



110. pinguescens* 

 Sides of prothorax closely punctate to the extreme margin, or with the 

 punctuation only very narrowly sparser when the margin is j-ellow; sides 

 moderately to strong]}^ rounded in the cf , much less so in the 9 ; last ven- 

 tral segment always entirely black. 



Yellow markings few to many 118. californicus * 



Yellow markings entirely lacking var. gagatinus 



15. Front claws of cf small 16 



Front claws of cf obviously but not strongly enlarged 17 



Front claws of cf conspicuously enlarged 18 



16. Entirely black or very nearly so. 



Punctures of prothorax nearly or quite as coarse, as those of the elytra; 

 eyes of cf separated by barely twice the length of the basal antennal 

 joint. 



Prothorax of cf without narrow smooth margin; form shorter; elyt- 



ral striae better defined. (Florida.) 9S. stygicus 



Prothorax of cf with narrow smooth margin; form a littl(> mor(> elon- 

 gate; elytral striae ill-defined. (Arizona.) 99. lachrymosus 



Punctures of prothoi'ax distinctty finer than those of the eljtra and 

 more evenly distributed; eyes of cf separated bj- nearh' three times 



the length'of the basal anteimal joint 113. carbonarius 



Black or fuscous, sometimes with few, but usually with numerous small 

 yellow spots, at least on the eMra; eyes of cf separated by twice the length 

 of the basal antennal joint or a little more 95. atomarius* 



17. Size much smaller (not over 3 mm. in length); eyes of cf separated by 



fullv twice the length of the basal antennal joint, the basal joint black or 



fuscous throughout. (Lower Mississippi Vallej'.) 96. vestigialis* 



Size larger (3.4 to 4.3 mm.); eyes in cf separated by distinctly less than 

 twice the length of the basal antennal joint. (Western Texas to Arizona.) 



(')'). wenzeli 

 IS. Ej^es of cf separated by fully twice the length of the basal nntennal joint. 



149. confusus* 

 Eyes of cf separated by H times the length of the basal antennal joint, or 

 less. 

 Size smaller (about 3 mm.), front claws of cf It'ss strongly enlarged. 



61. ixnpurus \ar. umbrosus 

 Size larger, front claws of cf more strongly enlarged . . .l.JO. luridus 



THANS. ^UI. ExNT. SOC, XLI. 



