246 PROCEEDINGS OF THE NATIONAL MUSEUM vol. us 



Body beneath dark (hidden by the gkie on which it is stuck to a card) ; 

 middle tibiae of the male excised near the apex. Length 2.8 mm; 

 width 1.3 mm. 



Type, male, MCZ, from Guanajuato, Mexico, Salle collector. 



Remarks: This is another of the species with excised middle tibiae 

 and with the terminal joints of the antennae enlarged in the male. 

 It differs from the others of the genus Luperosoma in that the pro- 

 thorax is not at all depressed, in this respect resembling the species 

 of the West Indian genus Ectmesopus. In fact, except for the locality 

 of Mexico, there is little to differentiate this from the West Indian 

 genus. 



Platymorpha centromaculata (Jacoby) 



Figure 9 



Malacorhinus centromaculatus Jacoby, in Godman and Salvin, Biologia Centrali- 

 Americana, Coleoptcra, vol. 6, pt. 1, p. 590, 1888. 



About 7 mm. in length, elongate oblong oval, not at all shiny, dull 

 alutaceous, the elytra densely but not coarsely punctate, the prothorax 

 faintly depressed in the lower half, pale yellow brown, on the etytra 2 

 piceous spots below the middle and a faint trace of spotting near the 

 base in middle, the femora dark streaked, tibiae, tarsi, and antennae 

 dark. 



Head with interocular space more than half width of head, a m.edian 

 depressed line down the occiput and a depression over the frontal 

 tubercles, alutaceous with a few punctures on the occiput, carina short, 

 front short. Antennae extending to the middle of the elytra, piceous 

 with the terminal three joints a little paler brown, second and third 

 joints short. Prothorax with the sides only slightly curved and with 

 a very faint depression in the basal half, alutaceous, the punctation 

 distinct on the ridges on the sides, entirely pale yellow brown. Scutel- 

 lum pale. Elytra alutaceous, rather densely and finely punctate, 

 pale yellow brown, each elytron having a piceous spot below the middle, 

 and a very faint trace of a spot in middle near the base. Body beneath 

 pale with the breast a shade darker and the femora pale with a dark 

 outer streak, tibiae and tarsi dark, claws appendiculate. Length 7 

 mm.; rndth 3.3 mm. 



Type, female, MCZ, from Capetillo, Guatemala, Champion collector. 



Remarks: Jacoby put this species "provisionally" in the genus 

 Malacorhinus but wrote that it differs from the others in the "more 

 transversely shaped and not posteriorly constricted thorax and 

 in the longer metatarsus of the posterior legs." The short third 

 antennal joint, the shape of the prothorax with its very faint depres- 

 sion, the coloring of the whole beetle, together with its alutaceous 

 surface, all resemble species of Platymorpha. Jacoby had at least one 



