66 Mr. G. C. Champion's Revision of the Mexican 



Var. 7. Elytra wholly testaceous, the black median vitta of the 

 prothorax well developed, cj $. 



cJ. Eighth ventral segment long, raised and much narrowed 

 towards the apex, and produced on each side of the medium notch 

 into an oblique elongate-triangular plate (as seen in profile), which 

 is somewhat hooked at the base above (lower portion of fig. 23); 

 ninth segment long, narrowed towards the base and apex, the 

 internal sac, as seen evaginated, armed with four pairs of long, 

 curved hooks (the pair nearest the base longer and stouter than 

 the others), the central tube very long and enclosing a slender, 

 hooked flagellum (fig. 23a). 



Hab. Mexico, Morelos, Jalisco, Vera Cruz, Guerrero, 

 Oaxaca, Mexico City, etc. ; Guatemala, Totonicapam, 

 Capetillo. 



One of the commonest species of the genus in Mexico, 

 the form with wholly black elytra being more abundant 

 than the variety with fiavous suture and outer margin 

 (= dubium, Gorh.). The var. ^ is represented by three 

 females from Chilpancingo and one from Cuernavaca, and 

 the var. y by six specimens (c^$), five of which are in the 

 Hope collection at Oxford. Two species from Oaxaca 

 were included by Gorham under D. dubium, his type and 

 description applying to the var. a of D. normale. An 

 interesting series connecting the various forms was obtained 

 by Mr. H. H. Smith at Omilteme, in the mountains of 

 Guerrero, females, as usual, predominating. The peculiar 

 genital armature and the form of the intermediate tarsal 

 claws of the male distinguish D. normale from most of its 

 allies. The species is nearly related to D. lampyroides, 

 Gorh. Eleven males have been dissected, showing con- 

 siderable variation in the development of the produced, 

 raised, apical portions of the eighth ventral segment. D. 

 flavo?narginatum, Schaeff., from the Huachuca Mts., 

 Arizona, seems to be a form of D. normale. 



62. Discodon perplexum. 



Discodon perplexum, Gorh., Biol. Centr.-Am., Coleopt. iii, 

 2, p. 83 {^) {nee p. 287). 



(^. Broad, black, the sides of the head in front, the base of the 

 mandibles, the prothorax (a rather narrow median vitta excepted), 

 and the apical two segments or more of the abdomen, fiavous or 

 testaceous, the femora obscure testaceous. Antennae very long, 



