HETEROCBEPIDIUS.— ATKACTOSOMtTS. 297 



HETEROCREPIDIUS. 



Heterocrepidius, Guerin, Mag. Zool. 1838, Ins. Voyage de la Favorite, p. 24; Candeze, Monogr. 



Elat. ii. p. 31 (part.). 

 Heterupus, Gerrnar, Zeitschr. fur Ent. i. p. 207 (1839). 



This genus, as restricted by Fleutiaux*, contains sixteen species — thirteen from 

 South America, one from Mexico, and two from S. Africa. The Mexican insect is 

 here referred to Anoplischius. 



The new species from Costa Rica described below is an aberrant form, but it 

 possesses most of the structural characters of the genus. 



1. Heterocrepidius megalops. (Tab. XIII. figg. 13, 6 ; 13 a, maxillary 

 palpus.) 



Very elongate, subparallel, rather broad, moderately convex, shining, pitchy-brown, the epipleurse and the 

 apex of the terminal joint of the antennae ferruginous ; above and beneath thickly clothed with long 

 fulvo-cinereous hairs. Head flattened and slightly depressed in the middle between the eyes, somewhat 

 thickly, moderately finely punctate ; the eyes smooth, exceedingly large, projecting laterally beyond the 

 anterior angles of the prothorax ; the frontal carina flexed downwards, not prominent, truncate ante- 

 riorly; the antennae slender, extending fully to the middle of the elytra, joints 3-11 gradually increasing 

 in length and decreasing in width, 3 and 4 subequal, 11 much longer than 10. Prothorax transverse, 

 trapezoidal, slightly compressed at the sides before the middle, convex in front, flattened behind; the 

 hind angles narrow, greatly produced, divergent, curved inwards at the tip, feebly carinate above ; the 

 surface sparsely, finely punctate. Scutellum very sparsely punctured. Elytra nearly five times as long 

 as the prothorax, parallel to about the middle, and gradually narrowing beyond, the apices conjointly 

 rounded ; finely and lightly punctate-striate, the punctures somewhat widely separated, becoming coarser 

 towards the sides ; the interstices almost flat, sparsely, finely punctate, the punctures similar to those of 

 the inner striae. Beneath finely, rather closely punctate ; prosternum slightly declivous in front, with an 

 abruptly raised chin-piece .; posterior coxal plates rapidly and obliquely narrowing outwards. Legs very 

 elongate ; anterior and intermediate tarsi with joints 1-3, and the hind tarsi with joints 1 and 2, 

 lamellate beneath. 



Length 16, breadth 4± millim. ( S •) 



Hah. Costa Eica, Volcan de Irazu 7000 feet (Rogers), 



One specimen. This insect resembles the Colombian Anoplischius conicicollis and 

 A. longipennis, Cand., in its general shape. It differs from all the described species of 

 Heterocrepidius in its very elongate limbs, enormous eyes, very elongate elytra, and 

 strongly raised prosternal chin-piece. The third joint of the antennae is as long as the 

 fourth. The apical joint of the maxillary palpi is oblong-ovate, a character separating 

 the species from Anoplischius. 



ATRACTOSOMUS. 



Atractodes, Germar, Zeitschr. fur Ent. i. p. 219 (1839) (nomen praeocc.) ; Candeze, Cat. Method. 



Elat. p. 63. 

 Atractosomus, Lacordaire, Gen. Col. iv. p. 173 (1867) ; Candeze, Monogr. Elat. ii. p. 132. 



The twenty-one described species of this genus are all from Tropical America, two 



* Ann. Soc. Ent. Fr. 1892, p. 408. 



biol. centr.-amee., Coleopt., Vol. III. Pt. 1, January 1895. 2 Q 



