480 PROCEEDINGS OF THE NATIONAL MUSEUM vol. ii< 



Genus Maemactes Schoenherr 



Maemactes Schoenherr, Genera et species curculionidum, vol. 4, p. 276, 1837. — 

 Champion, Biologia Centrali-Americana, Coleoptera, vol. 4, pt. 4, p. 529, 

 1905. Type of genus: Maemactes ruficornis Boheman, by monotypy. 



Baropsis LeConte, Proc. Amer. Philos. Soc, vol. 15, no. 96, p. 258, 1876. — 

 Champion, Biologia Centrali-Americana, Coleoptera, vol. 4, pt. 4, p. 529, 

 1905. New synonymy. Type of genus: Baropsis cribratus LeConte, by 

 monotypy. 



Champion (1905) questioned the validity of Baropsis LeConte but 

 did not synonymize it with Maemactes. Comparision of B. cribratus 

 LeConte, the type of Baropsis by monotypy, with available species of 

 Maemactes reveals no significant difference between the genera; in 

 fact it is with some difficulty that cribratus is distinguished from 

 some species of Maemactes. 



M. vestitus Kirsch, from Peru, is inchided in the following key on 

 the basis of the original description; I have not seen specimens of 

 this species. 



Key to Species of Maemactes 



1. Elytra clothed in part with both erect setae and decumbent scales .... 2 

 Elytra lacking broad scales 3 



2. Elytral intervals convex, with black erect setae; suture between sternites 1 and 



2 curved at the middle perforatus Champion 



Elytral intervals flat, with white erect setae; suture between sternites 1 and 

 2 straight vestitus Kirsch 



3. In dorsal view rostrum at widest point less than three times as wide as frons 



at narrowest point 4 



In dorsal view rostrum at widest point four or more times as wide as frons 

 at narrowest point cribratus (LeConte) 



4. Punctures of dorsal surface of prothorax coarse, more than 0.12 mm. in diame- 



ter, containing a small seta-bearing puncture on one side which has its inner 

 rim projecting into the large puncture; interspaces on prothorax polished and 



with numerous minute punctures punctatus, new species 



Punctures on dorsal surface of prothorax smaller, setae arising centrally from 

 bottom of punctures; interspaces on prothorax microreticulate and lacking 

 minute punctures 5 



5. Frons wide, in dorsal view rostrum at widest point about one-tenth wider 



than frons; elytra with obvious (at X 15) erect setae, intervals narrow and 



convex, striae obvious and complete pilosus Champion 



In dorsal view rostrum at widest point one-fifth or more wider than frons; 

 elytra lacking obvious erect setae, intervals flat or irregular, striae in part 

 incomplete 6 



6. Elytral intervals more or less flat throughout, dull, with dark setae less than 



0.06 mm. long; strial punctures evenly spaced; sternite 2 distinctly longer 

 than sternite 5; median lobe of aedeagus of male 0.50 mm. in length (basal 



struts excluded) ruficornis Boheman 



Elytral intervals in part convex, polished and shining, with yellowish setae 

 0.06 to 0.10 mm. long; strial punctures irregularly placed; sternite 2 as long 

 as sternite 5 (in male); median lobe of aedeagus of male 1.25 mm. long 

 (basal struts excluded) imitator, new species 



