44 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 123 



much below humeri, outer joints distinctly wider. Prothorax with 

 rounded sides, widest at base, convex, densely and finely punctate 

 with a bare impunctate median line and several small round impunctate 

 areas; pubescence moderately long and thick, covering surface. 

 Scutellum black, with a few white hairs. Elytra convex with a short 

 intrahumeral sulcus and no depression about scutellum; shiny, piceous, 

 densely punctate with horizontal ridges between punctures; pubes- 

 cence moderately dense and with patches of long white hairs in four 

 lines on each elytron. Body beneath with long white pubescence, 

 tibiae and tarsi reddish brown. Length 7-7.5 mm. ; width 3.2-3.8 mm. 



Type: U.S. National Museum no. 65355. 



Type-locality: Rosario del Tala, Entre Rios, Argentina, December 

 1941, F. Monros. 



Other localities: Argentina: Gualeguaychu, Entre Rios, Decem- 

 ber 1941, Haldo; Santa Elena, Entre Rios, Jan. 18, 1912, G. E. 

 Bryant. 



Remarks: This is a more convex and a more densely pubescent 

 species with more white patches of hairs on the elytra than G. pin- 

 nigera. Its median prothoracic line is more plainly evident too. 

 It comes from Entre Rios Province, which is quite a different environ- 

 ment from that of G. pinnigera from the Chaco region. 



Glyptoscelis pinnigera Blake 



Figure 34 

 Glyptoscelis pinnigera Blake, 1952, Act. Zool. Lilloana Ins. "Miguel Lillo," vol. 

 10, pp. 165-6. 



From 6 to 7 mm. in length, oblong oval, shining black, antennae 

 and sometimes tibiae and tarsi reddish brown, prothorax about 

 one-third wider than long, nearly as wide as elytra, lightly pubescent 

 and finely punctate with remnants of a median bare impunctate line 

 and several small round impunctate areas on either side; elytra more 

 coarsely punctate. 



Head with interocular space slightly more than half width of head, 

 lower front not very distinctly separated from upper, finely punctate 

 with usually a median bare impunctate line down front, pubescence 

 brownish and white. Antennae extending slightly below humeri, 

 reddish brown with the basal joint darker, seventh joint long and 

 apical joints wider. Prothorax nearly as wide as elytra and not very 

 convex (for the genus as a whole) ; rather finely and densely punctate 

 with numerous small round bare spots, and often part of a bare 

 median line; a fine featheiy brown and white pubescence arranged 

 horizontally from the middle. Scutellum with a few hairs. Elytra 

 with a short intrahumeral sulcus, no depression or elevation about 

 scutellum, punctation coarser than that of prothorax with horizontal 



