100 PROCEEDINGS OF THE NATIONAL MUSEUM vol. los 



only nine joints of one antenna and the basal joint of the other left; 

 joints 1-7 black, 8 and 9 pale. Prothorax not quite twice as wide as 

 long with nearly straight sides and scooped-out transverse depression 

 in basal half; except in this depression the surface punctate; shining 

 black. Scutellum black. Elytra widened toward apex with wide 

 explanate margin, very shiny black with moderately dense puncta- 

 tion; no suggestion of costae. Body beneath shining black with pale 

 abdomen; anterior coxal cavities open, anterior tibiae in male thick- 

 ened, middle tibiae in male excised near apex; first tarsal joint of hind 

 legs longer than succeeding joints together; claws appendiculate. No 

 terminal spurs discernible on tibiae. Length 4 mm. ; width 2.2 mm. 



Type: Male in Cornell University collection, from LaChorerra, 

 Putumayo District, Peru, collection Aug. 17-20, 1926. 



Remarks: This is another galerucid that has characters similar to 

 the group with excised tibiae but differs in the male sex characters, 

 being unusual in the shortness of the 3d antennal joint. In this case 

 the 3d joint is unlike the short 3d joint found often in Diabrotica, 

 Luperosoma, or Iceloceras in that it is not so long as the second, 

 truncate at the apex, and cup-shaped. It most closely resembles the 

 antennae of the two species of Platymorpha, and I am tentatively 

 placing the species in that genus although it is not very closely related. 



References 



Balt, Joseph Sugar 



1886a. The Colombian species of the genus Diabrotica, with descriptions of 

 those hitherto uncharacterized. Pt. 2. Journ. Linn. Soc. Zool., 

 vol. 19, pp. 230-259. 

 1886b. Descriptions of uncharacterized species of Diabrotica. Trans. Ent. 

 Soc. London, pp. 443-455. 

 Blake, Doris Holmes 



1940. A new genus of Galerucinae (Coleoptera) from the West Indies. 

 Proc. Ent. Soc. Washington, vol. 42, pp. 95-104, 

 Chapuis, Felicien 



1876. Histoire naturelle des insectes. Genera des col6optferes . . . [cont. 

 of Lacordaire]. Vol. 11, 420 pp. 

 Dejean, p. M. M. a. 



1837. Catalogue des col^optferes .... Ed. 2, livre 5, 503 pp. 

 Gahan, Charles Joseph 



1891a. On the South American species of Diabrotica. Pt. 2. Trans. Ent. 



Soc. London, pp. 415-472. 

 1891b. On the South American species of Diabrotica. Appendix. Trans. 

 Ent. Soc. London, pp. 521-524. 

 Horn, George Henry 



1893. The Galerucini of boreal America. Trans. Amer. Ent. Soc, vol. 20, 



pp. 57-136. 

 1896. Coleoptera of Baja California (supplement II). Proc. California 

 Acad. Sci., ser. 2, vol. 6, pp. 367-381. 



