ALAMPES.— ISCHIUS. 475 



denser at the sides. Scutellum densely punctured. Elytra about two and four-fifths longer than the 

 prothorax, rapidly narrowing from a little below the base in both sexes ; finely and rather deeply punctate- 

 striate, the interstices feebly convex and densely, rugulosely punctate ; the apices narrow, slightly dehiscent, 

 and submucronate. Beneath closely and finely, the prosternum coarsely and sparsely, punctured. 



Var. The oblique stripe on each elytron obliterated. 



LeDgth 14-17^, breadth 3f-4f millim. ( tf $ .) 



Hab. Nicaragua, Chon tales {Belt); Panama, Bugaba {Champion). 



Seven specimens, both forms occurring in each locality. Closely allied to A. abnormis 

 (Cand.), from Colombia, the type ( 6 ) of which is before me, but easily separable from 

 it by the blackish-brown pubescence on the scutellum. The variety closely resembles 

 that insect. As in A. abnormis, the pubescence is coarse and dense, and almost hides 

 the sculpture. The genitalia of the males are similarly formed. 



ISCHIUS. 



Ischius, Candeze, Monogr. Elat. i. p. 195 (1857) ; Elat. Nouv. ii. p. 42; Cat. Method. Elat. p. 163. 

 The two described species of this genus are from Tropical South America — one from 

 Guiana and one from Ecuador ; a third from our region is now added. Ischius is 

 closely related to Pyrophorus, a position subsequently assigned to it by Candeze. 



1. Ischius haagi. (Tab. XXI. fig. 5.) 



Ischius haagi, Cand. in litt. 



Moderately elongate, broad, robust, slightly shining, black ; the prothorax flavo-testaceous, with a very large 

 subcruciform black patch, extending to near the lateral margins, base, and apex, and bordered on all sides 

 with reddish-brown, the tubercle at the base, and the tips of the hind angles also in one specimen, reddish- 

 brown ; the propleurse entirely flavo-testaceous ; above and beneath thickly and very finely pubescent, the 

 pubescence on the front and base of the head, the sutural and lateral margins of the elytra, and the dark 

 portions of the under surface cinereous, fuscous on the rest of the elytra and on the prothoracic patch, and 

 flavous on the other parts of the prothorax. Head densely, moderately finely punctate, broadly, 

 triangularly depressed in front ; antenna? short, not reaching the hind angles of the prothorax, strongly 

 dilated and serrate from the fourth joint, the third joint small, slightly longer than the second. Prothorax 

 a little longer than broad, rounded at the sides, widest at the middle, and distinctly narrowed behind ; the 

 hind angles moderately long, stout, divergent, and carinate ; the surface densely, finely, uniformly punc- 

 tate, with an incomplete, smooth, slightly raised median line: the base with a prominent, abruptly raised 

 rounded tubercle in the centre. Elytra two or two and one-fifth times the length of the prothorax, 

 somewhat rounded at the sides, and narrowing from a little below the base ; finely punctate-striate, the 

 strise deeply impressed at the base, the interstices flat or very feebly convex and densely, minutely 

 punctate ; the apices conjointly rounded, slightly divaricate at the suture. Beneath closely and finely, 

 the prosternum sparsely and coarsely, punctate. 



Length 1 6-22, breadth 4|-6| millim. 



Hab. Mexico {coll. Janson) ; Guatemala, Coban {Champion). 



Two specimens, differing greatly in size, probably male and female. Apart from the 

 very dissimilar coloration, this species may be at once separated from the South- 

 American forms by the small third joint of the antenna?. The specimen in the Janson 

 collection is labelled "I. haagi, Cand., type," but I am unable to find any published 

 description of it. 



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