14 BULLETIN 14 5, UNITED STATES NATIONAL MUSEUM 



Small species (4.5-5.75 millimeters) ; inner tooth of tarsal claws short and 

 broad ; male genitalia slender, with the sides parallel to each other. Host 



plant: Dogwood (75) cephalicus LeConte. 



S4. Tarsal claws cleft in such a manner that the inner portion is turned inward, 



nearly or quite touching that of the opposite side (76) strigicollis Fall. 



Tarsal claws simply cleft, the inner portion not or only feebly turned in- 

 ward and the tips distant 85. 



85. Upper surface with pubescent spots, vittae, or irregular designs 86. 



Upper surface sometimes uniformly pubescent, but the pubescence not form- 

 ing spots, vittae, or irregular designs 121. 



86. Pronotum distinctly gibbose; each elytron with a longitudinal pubescent 



vitta along the sutural margin (77) gibbicollis Fall. 



Pronotum not gibbose 87. 



87. Pronotum with prehumeral carinae (sometimes only vaguely indicated). 



88. 

 Pronotum without prehumeral carinae 117. 



88. Elytra with more or less distinct pubescent spots or vittae 89. 



Elytra with more or less distinct irregular pubescent designs 113. 



89. Elytra with longitudinal pubescent vittae along the sutural margins 90. 



Elytra with rounded or elongate pubescent spots 102. 



90. Front of head convex, or at most, with a shallow longitudinal groove__ 91. 

 Front of head distinctly depressed and more or less concave 97. 



91. Pronotum vaguely rugose (78) pubifrons Fisher. 



Pronotum distinctly rugose or scabrous 92. 



92. Pronotum finely, transversely rugose 93. 



Pronotum coarsely, irregularly rugose, or scabrous 96. 



93. Pvosternal lobe distinctly emarginate in front. 



(79) olentangyi Champlain and Knull. 

 Prosternal lobe rounded or subtruncate in front 94. 



94. Pronotum with the marginal and submarginal carinae separated for their 



entire length; pubescent vittae on elytra distinct (80) mimosae Fisher. 



Pronotum with the marginal and submarginal carinae not separated for 

 their entire length ; pubescent vittae on elytra feebly indicated 95. 



95. Head convex, at most only vaguely grooved ; above piceous, sometimes with 



a vague cupreous tinge; small species (3-4.25 millimeters) ; male genitalia 



with the median lobe broadly rounded at apex (81) chiricahuae Fisher. 



Head usually rather distinctly grooved ; above cupreous brown ; large species 

 (5-8 millimeters) ; male genitalia with the median lobe obtusely angulated 

 at apex (82) aeneocephalus Fisher. 



96. Pronotum wider than long; pubescent vittae on elytra feebly indicated; male 



genitalia with a distinct tooth on each side of the median lobe near apex. 



(S3) malvastri Fisher. 

 Pronotum not wider than long; pubescent vittae on elytra distinct: male 

 genitalia without a tooth on the median lobe near apex. 



(84) falli Fisher. 



97. Prosternal lobe broadly rounded or subtruncate in front 98. 



Prosternal lobe distinctly emarginate in front; elytra with the pubescent 



vittae obsolete, or the pubescence uniformly distributed except in the 

 humeral regions (79) olentangyi Champlain and Knull. 



98. Pronotum with more or less distinct median depressions 99. 



Pronotum strongly convex, and without median depressions 101. 



