AMITHAO.— DESICASTA. 361 



head and thorax are very much smoother, and the whole upper surface tawny-red with 

 a golden tinge, and highly polished ; the sternal process is elongated, flattened, and 

 slightly curved upwards at the tip. The clypeus has a much shallower emargination, 

 and the convexity of the middle of the forehead is slight and slopes in front into a 

 moderately deep pit. The front and lateral margins of the clypeus differ also in being 

 sharply raised. 



7. Amithao erythropus, (Tab. XXII. fig. 19.) 



Cotinis erythropus, Burm. Handh. der Ent. iii. p. 263 \ 



Var. Supra immaculata. 



Cotinis moreletii, Blanch. Cat. Coll. Ent. i. p. 33 2 ? 



Hal. Mexico 12 , Cordova, Toxpam, Tanetza (Salle), Jalapa (Edge); Guatemala, 

 Panzos in Vera Paz (Conradt). 



The forehead and clypeus are shaped nearly the same as in A. pyrrhonotus, but the 

 sternal process differs in being short and conical. The legs in all our examples (except 

 an immature one) are black. An example in the Salle collection is entirely without 

 white tomentose markings, and agrees with Blanchard's description of G. moreletii, 

 except in the black legs. 



A specimen from Panzos is figured. 



DESICASTA. 



Desicasta, Thomson, Typi Cetonid. p. 14 (1878) . 

 Moscheuma, Thomson, Le Naturaliste, i. p. 268 (1880). 

 Stethodesma (pars). 



After defining the genus somewhat imperfectly in 1878, Thomson redescribed it 

 more intelligibly in 1880, re-naming it and giving the same species as belonging to it. 

 The only character which distinguishes it from Amithao is the obliquely deflected and 

 thick sternal process, described by Thomson as " mesosterni appendix robustissima sat 

 elongata, paullo subtus directa, apice rotundato." D. lobata (Oliv.), a well-known species 

 from Guiana, is included both in Desicasta and Moscheuma by the author, also 

 I), sculptilis, Thorns, (the type of Desicasta), the description of which offers nothing to 

 distinguish it from D. lobata and D. reichei, Thorns. Under Desicasta is further enume- 

 rated D. hcematopus of Schaum, which does not agree with the others in the form of 

 the sternal process. 



The genus appears to be confined to Colombia (with Panama) and Guiana. D. lobata 

 (Oliv.) and D. sebosa (Van de Poll) are also found on the Lower Amazons. 



l. Desicasta laBvicostata. 



Moscheuma Icevicostatum, Van de Poll, Notes from the Leyd. Mus. viii. p. 235 \ 

 Hab. Panama 1 . 



I have not seen this species. 

 biol. CENTE.-AMEK., Coleopt., Vol. II. Pt. 2, March 1889. 3 AA 



