288 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.50. 



Thorax robust, elytral striae extending distinctly to about the 



middle, the outer rows longer .fuscula LeConte . 



Elytra brownish with a median fascia and a spot on apices pale. 



fuscula, var. texana Gorham. 

 Elytra brownish with three irregular pale fasciae, often more or less inter- 

 rupted at the suture, sometimes covering greater part of surface, apex dark. 



undulata Say. 



Elytra brown with a lateral, pale median spot var. arizonica Schaeffer. 



Elytra brown, markings wanting : var. brunnea Spinola. 



CONFUSA group. 

 Cymatodera confusa Wolcott is the only species of this group. 



A KG US TA TA group. 



Head and thorax varying from pale brown to piceous; never with metallic luster. 

 Elytra pale testaceous, the fasciae piceous varying in number from one to three; 



head, thorax and elytra at base very coarsely punctate balteata LeConte. 



Elytra brown with one or more rather indistinct pale fasciae. 

 Thorax very densely and rather coarsely punctate. 



Body rather robust; thorax distinctly rugose ovipennis LeConte. 



Body slender, elongate. 



Head smaller, eyes very prominent; thorax strongly constricted 

 before the middle, strongly compressed posteriorly. 



vandykei Schaeffer. 



Head larger, eyes less prominent; thorax very feebly constricted 



anteriorly, not strongly compressed posteriorly; elytra usually 



with three fasciae angustata Spinola. 



Thorax very sparsely and finely punctate cephalica Schaeffer- 



Head and thorax blue, with distinct metallic luster; thorax finely and sparsely punc. 

 tate, feebly transversely wrinkled purpuricollis Horn. 



Mr. Schaeffer * states that the specimen upon which the descrip- 

 tion of soror Wolcott, was based was a male and not a female and 

 places soror as a synonym of his antennata. Mr. Shaeffer's statement 

 is correct as far as it applies to the sex of the type specimen, but 

 he is in error in assuming them to be identical species. While the 

 two species are very similar in general appearance, they are in 

 reality quite distinct, differing in antennal structure and in the 

 secondary sexual characters of the abdomen. I have before me two 

 males, one from Baboquivari Mountains, Arizona, the other from 

 Ramsey Canon, Huachuca Mountains, Arizona, which agree perfectly 

 with the type of soror in all details. A comparison of these with a 

 male specimen of antennata from Nogales, Arizona, shows that in 

 soror the second and third antennal joints are equal and together 

 distinctly shorter than the fourth joint; in antennata the second and 

 third joints are unequal and together as long as the fourth joint. 

 The apical (eleventh) joint is also much longer and more slender in 

 soror. In the latter species the fifth ventral segment of abdomen is 

 distinctly arcuate at apex, whilst it is truncate in antennata; the 



« Journ. N. Y. Ent. Soc, vol. 25, 1917, p. 129. 



