324 PROCEEDINGS OF THE NATIONAL IVITJSEUM ^°^- "^ 



Neobrotica. The third antennal joint is only half as long as the fourth. 

 The head lacks a carina. Dr. Gerhard Scherer has made a detailed 

 drawing of the front of the head. Until a male is found I cannot place 

 this in a genus. The claws while not bifid have a longer basal tooth 

 than is usual in the Neobrotica. 



Hystiopsis, new genus 



Elongate oblong oval, the head in both sexes with the lower front 

 depressed below the antennal sockets, the antennae alike in both 

 sexes, being filiform with the third and fourth joints subequal. Pro- 

 notum with a well defined transverse sidcus. Elytra strongly costate 

 with the intervals more or less coarsely and usually geminate striately 

 punctate. Anterior coxal cavities open, tibiae with a spine at the 

 end, anterior tibiae in the male usually enlarged and the first tarsal 

 joint in the male usually thickened, first tarsal joint of hind legs 

 longer than the others together, claws appendiculate. 



Type species: Crioceris marginalis Fabricius. 



Remarks: The genus is erected for a group of South American beetles 

 that are closely related to Neobrotica, Eccoptopsis, and Eucerotoma. 

 They have the strong elytral costae of Eucerotoma, but lack the sexual 

 differences found in the excavated face and antennal joints of the male 

 in both Eucerotoma and Eccoptopsis. They are closely related to 

 Neobrotica but dififer in the depressed lower front of the face. This 

 depressed lower front is common to both sexes and not so definitely 

 excavated as in Eucerotoina and Eccoptopsis. 



The name Hystiopsis is derived from the Greek vanos, meaning 

 "bent back," and 'o^ls, meaning "face." 



Key to Species of Hystiopsis 



1. Head pale on occiput 2 



Head dark on occiput 3 



2. Elytra with a dark lateral vitta from humerus to near apex and also a dark 



sutural vitta marginalis (Fabricius) (p. 325) 



Elytra with a dark area about scutellum and three dark spots on each 

 elytron exarata, new species (p. 338) 



3. Elytra dark with pale spots or fascia 4 



Elytra pale with dark spots, fasciae or vitta 8 



4. Prothorax pale with a dark median vitta . . irritans, new species (p. 334) 

 Prothorax entirely pale 5 



5. Each elytron with three pale spots, the apical one being open at apex . . 6 

 Each elytron with less than three spots 7 



6. Apical spot common to both elytra grossa, new species (p. 337) 



Apical spot not common to both elytra . . maculata, new species (p. 334) 



7. Elytra with a narrow pale fascia below middle and no spots. 



zonata, new species (p. 333) 



