no. 3604 GLYPTOSCELIS — BLAKE 47 



Glyptoscelis gigas Jacoby 

 Figure 37 

 Glyptoscelis gigas Jacoby, 1897, Entomologist, vol. 30, p. 262. 



Between 11.5 and 14.5 mm. in length, elongate oblong oval, not 

 very shiny, with white or yellowish, closely appressed, scalelike pubes- 

 cence, deep reddish brown to piceous, with dark-brown to piceous 

 antennae and legs, densely and not very coarsely punctate, punctures with 

 horizontal ridging in basal part of elytra; pubescence arranged in three vit- 

 tate lines of denser scales on sides and middle of both pronotum and elytra. 



Head with eyes emarginate at antennal sockets, a median line down 

 front, not very densely or coarsely punctate and with closely appressed, 

 white, scalelike pubescence. Antennae dark brown, with fine white 

 hairs, not extending to middle of elytra, outer joints slightly thicker, 

 seventh joint long. Pro thorax with slightly curved sides, convex, 

 and with a well-marked depression in middle of base, rather densely 

 and not very coarsely punctate, not very shiny, with three more 

 densely pubescent areas forming two lateral and a median pale vitta. 

 Scutellum broader than long, finely punctate, and with scales. Elytra 

 very long, tapering gradually from humeri, which are the widest part 

 of elytra, to apex, which is sharp but not produced as in G. aeneipennis 

 Baly; surface transversely wrinkled and with not very coarse or dense 

 punctures becoming finer and sparser in apical half and on sides, 

 pubescence in form of lateral and sutural three white vittae, with 

 sparser white scales scattered between; in one specimen these vittae 

 widen toward apex to cover entire apex, this specimen also bright 

 reddish brown and larger than the others (14.5 mm.). Body beneath 

 covered with pale scales, in the reddish-brown one the entire lower (apical) 

 half pale with pubescence, not so dense in darker specimens. Claws with 

 very short inner tooth near base. Length 1 1.5-14.5 mm.; width 5-5.8 mm. 



Type: In "Oxford Museum." 



Type-locality: Brazil, "without particular locality, obtained by Myers." 



Other localities: Argentina: La Rioja; El Borbollon, Mar. 13, 

 1944, F. Monros; Rio Salado, Santiago del Estero, Wagner. 



Remarks : Except the type, which I have not examined, only three 

 specimens are known to the writer. These three are all from the Mon- 

 r6s collection, and all from Argentina. Two of them are dark brown 

 and much rubbed, so that there are not many scales left, the third 

 specimen, bright reddish brown and covered with pale yellowish 

 scales, is larger. Whether all three are one species I cannot determine 

 because of lack of material, but the one drawn, which is brownish 

 piceous with white pubescence, corresponds with Jacoby 's description. 

 Jacoby wrote that this is the largest species not only of the genus but 

 of the whole group of Myochroini. A new genus possibly may be 

 erected for it at some future time. 



