98 PROCEEDINGS OF THE NATIONAL MUSEUM vol. los 



down the lower front. Antennae with the four distal joints missing, 

 pale yellow-brown, 3d joint longer than 2d and shorter than 4th. 

 Prothorax subquadrate, nearly as long as wide, with only shghtly 

 curved sides, pale yellow-brown, the lateral margins piceous black, 

 shining, impunctate; a dent in middle of disk (probably from im- 

 mature softness of specimen), the surface in life probably without 

 depression of any sort. Scutellum yellowish brown. Elytra shining 

 metallic green, impunctate. Undersurface and legs entirely pale 

 yellow-brown; anterior tibiae thickened in male, middle tibiae widely 

 and shallowly emarginate near apex. Length 2.7 mm.; width 1 mm. 



Type: Male, USNM 63364, from Bassin Bleu, Tortue Island, Haiti, 

 collected by E. C. and G. M. Leonard. 



Remarks: Although the specimen is immatm-e and badly shrivelled, 

 and the distal joints of the antennae are missing, this can readily be 

 seen as a distinctive little beetle Nvith its heavy dark markings on the 

 lateral margin of the prothorax. In addition, the middle tibiae of the 

 male are widely emarginate, in this respect resembling E. angusticollis 

 Blake from the Dominican Republic. It differs from that species in 

 the coloration of the margin of the prothorax as well as in having 

 metallic green instead of blue elytra, and also in being even narrower. 

 It is unfortunate that the end joints of the antennae, usually so ab- 

 normal in the male, are lacking. 



Genus Platymorpha Jacoby 



Platymorpha Jacoby, Biologia Centrali-Americana, Coleopt., vol. 6, pt. 1, p. 602, 

 1888. 



The original generic description is as follows : 



Body elongate; antennae longer than the body, the second and third joints ex- 

 tremely short, the other joints elongate-triangular; thorax subquadrate, the disc 

 depressed; elytral epipleurae continued below the middle; the posterior tibiae 

 mucronate, the first joint of the posterior tarsi as long as the following three joints 

 together; claws appendiculate; the anterior coxal cavities open. Anterior tibiae 

 and the first joint of the anterior tarsi strongly dilated in the typical species in the 

 male. 



Type Platymorpha variegata. 



In general appearance Platymorpha agrees with Chthoneis; the third joint of the 

 antennae, however, is extremely small, the posterior tibiae are armed with a 

 spine. The last named character proves the affinity of Platymorpha with Luperus 

 and its allies. I probably have only male specimens of P. variegata before me; 

 these are at once distinguished by the curious dilation of the anterior tibiae and 

 the first joint of the anterior tarsi. The two species I refer to this genus inhabit 

 Mexico and Guatemala. 



To Jacoby's description may be added that it is possible these two 

 species he has assigned to the genus are not congeneric. He originally 

 described smaragdipennis in the genus Chthoneis. The anterior tibiae 

 and first tarsal joint in the male in Platymorpha variegata sue much 



