664 PROCEEDINGS OF THE NATIONAL MUSEUM vol. in 



Hemelytron: Mesocorium with numerous punctures becoming finer 

 and closer apically; exocorium with numerous punctures becoming 

 obsolete toward costa; costa subparallel on basal half. 



Propleuron: Prosternal carinae about as high as labial II, evanescent 

 anteriorly, obtusely angled posteriorly. 



Legs: Anterior femur ventrally with premedian stout, unequally 

 furcate spine; anterior tibia with ventral margin straight, neither 

 angled nor toothed medially; posterior femur with subapical spine 

 spinose almost rectangularly bent at middle (fig. 161). 



Terminalia: Gonostylus as illustrated (fig. 300). 



Length of body: 4.17. 



Female: Similar to male, except anterior pronotal lobe with 

 minute but distinct punctures discally in addition to subapical and 

 lateral rows of coarser punctures; anterior femur not armed ventrally; 

 posterior femur ventrally with simple, moderate, oblique spine 

 subapically. 



Head: Length-width ratio, 0.91(0.90-0.92) :0.98(0.95-1.02); inter- 

 ocular width, 0.56(0.52-0.60). Antennal segments: I, 0.22(0.22- 

 0.23); II, 0.07(0.07-0.08); III, 0.44(0.43-0.45); IV, 0.35(0.35-0.36); V, 

 0.38(0.36-0.40). Labial segments: I, 0.33(0.32-0.35); II, 0.36(0.36- 

 0.36); III, 0.44(0.43-0.45); IV, 0.36(0.34-0.38). 



Pronotum: Length-width ratio, 1.75(L62-L89): 2.4 1(2.28-2.55). 



Scutellum: Width-length ratio, 1.29(1.20-1.39) :1.06(0.98-1. 14). 



Length of body: 4.25(4.04-4.46). 



Type data. — The types (BrAI) were listed by Distant as coming 

 from "Guatemala, Zapote (Champion); Panama, Volcdn de Chu-iqui, 

 4000 to 6000 feet (Champion)." 



Specimens studied. — 1 male, 2 females. 



Mexico: Mexico: Tejupilco, June 20, 1933, H. E. Hinton, R. L. Usinger, 

 1 female (RLU). Veracruz: Orizaba, Bilimek, 1883, Feb., 1 male, 1 female (Wien). 



Discussion. — This "giant" species of Amnestus is strongly marked 

 by the greatly prolonged clj^peus as well as the type of armature on 

 the posterior femur of both sexes, so it should not be confused with 

 any other known species of the genus. 



Unplaced species of Amnestus 



The following four species were described by Distant (1893). 

 None of these species appeared to be among the material examined 

 and there are not enough data available to permit accurate placement 

 of them in the key or in synonymy. Dr. China informed the author 

 that the types (BrM) are females with five marginal pegs on each 

 jugum. Further study of the types is necessary. To complete the 

 list of species for the region indicated in the title of this paper, the 

 original descriptions are quoted. 



