H. C. FALL 319 



Punctures and markings rust colored or brown in the 9 , sometimes fuscous 

 in the c?- (Eastern United States.) 101. roboris 



34. Head not wider than the thoracic apex. 



Pygidium entirely blackish. 



Eyes less distant; basal antennal joint bicolored, at least in the cf . 



(Eastern United States.) 03. atomarius* 



Eyes more distant, basal antennal joint black, or with at most tlie tip 



nubilously paler. (Kansas to Te.xas.) 96. vestigialis* 



Pygidium with pale spots, front claws of cf a little larger, eyes closer. 



(New York to North Carohna.) 97. obfuscatus 



Head a little wider than the thoracic apex. (Gulf and Atlantic Coast 



States.) 100. cephalicus 



var. dixianus 

 var. parvus 



35. Front without ocular lines 3G 



Front with ocular lines 46 



36. Species of the Atlantic, Mississippi and Gulf Region 37 



Species of New Mexico and Arizona 44 



37. Anterior tibiae without terminal spur, eyes subequally distant in the 



sexes; 10th antennal joint more than four times as long as wide. (Eastern 



United States.) 146. m-nigrum 



Anterior tibiae with terminal spur, eyes evidently more distant in the 9 . . 38 



38. Antennae nearly as long as the body in the cf, the 10th joint "nearly or quite 



four times as long as wide. (Eastern United States.) 103. relictus 



Antennae evidently shorter, the 10th joint from two to thi'ee times as long 

 as wide 39 



39. Striae of elytra unusually even and continuous from base to apex 40 



Striae of eljiira more or less broken and irregular except toward the decliv- 

 ity; color as a rule predominantly yellow (except spianarius) 41 



40. Black, and pale yellow, the colors rather strongly contrasting. 



104. carolinensis 



Black or fuscous, yellow spots few and inconspicuous. (Georgia to North 



CaroUna.) 105. luctuosus 



41. Marginal interspace of elytra conspicuously punctate nearly throughout 



its length. (Georgia; Carolina.) 102. spumarius 



Marginal interspace of elytra impunctate or virtually so (sparsely punctate 

 in fracl us) 42 



42. Markings brown, head very unevenly punctate. (Florida.) . . lOS. osceola 

 Markings black, head more evenly punctate 43 



43. Standard elytral spots generally all present and sharply defined. 



Prothoracic M normal, the median vitta widely forked or Y shaped an- 

 teriorly and connected with the lateral spots; elytra without conspicu- 

 ous sutural black stripe. (Gulf States.) 106. varians 



Prothorax trivittate, the median vitta usually entire, a little dilated but 

 not or scarcely divided in front and not connected with the lateral vit- 

 tae (or spots) ; elytra with a somewhat conspicuous black sut ural stripe 

 for I of its length. (Florida.) 107. conf ormls 



TR.\XS. AM. EXT. SOC, XLI. 



