356 SEEEICOENIA. 



Hab. Mexico (coll. Janson); Guatemala, San Geronimo and Zapote (Champion)-, 

 Panama, Volcan de Chiriqui, David (Champion). 



Numerous examples. The form I have taken as the type is from San Geronimo ; 

 the var. a, one specimen, is from the same locality ; the var. /3 is from Mexico, Zapote, 

 and Chiriqui ; the var. y, two specimens, is from Zapote. This minute species is not 

 very closely allied to any of the other members of the genus here enumerated, the 

 following excepted. In some of the specimens a very minute interstitial punc- 

 tuation is distinctly visible on the thorax. We figure a typical example from 

 San Geronimo. 



32. Monocrepidius parvulus. (Tab. XV. fig. 25.) 



Short and broad, convex, shining, finely and rather sparsely pubescent ; the head piceous ; the prothorax 

 ferrugineo-testaceous, with a large, triangular piceous patch on the disc extending from the apex down- 

 wards, or piceous, with a large patch on either side at the base and the anterior angles ferrugineo- 

 testaceous ; the scutellum ferruginous ; the elytra ferrugineo-testaceous, with the basal margin, the 

 suture rather broadly in front, an oblique stripe extending downwards from it to near the middle of the 

 outer margin (interrupted iu one specimen), and a common cruciform mark towards the apex, extending 

 along the suture to the tip, piceous or fuscous ; the antennae testaceous, the legs flavous, the under surface 

 ferruginous. Head convex, finely punctured, the frontal carina not prominent ; antennae with joint 3 

 slightly longer than 2, the two together longer than 4. Prothorax convex, about as long as broad, very little 

 narrower in front than at the base, rounded at the sides, and somewhat abruptly constricted and sinuate 

 immediately before the base ; the hind angles strongly, triangularly produced, scarcely divergent, with a 

 short, sharp carina at the sides above ; the surface rather sparsely, finely punctate, and canaliculate 

 behind. Scutellum convex. Elytra about one and two-thirds the length of the prothorax, narrowing 

 from the middle, conjointly rounded at the apex ; deeply punctate-striate, the interstices convex and 

 sparsely punctured. Fourth tarsal joint with a long narrow lobe beneath. 



Length 3, breadth 1 millim. 



Hab. Mexico, Cordova (Salle), Orizaba (coll. Janson). 



Two specimens. Allied to M. sexpustulatus, but less elongate and relatively broader, 

 the thorax more rounded, at the sides, the elytra not twice the length of the thorax, 

 the elytral markings different. The piceous elytral markings consist of a common 

 A-shaped mark before the middle and a rather broad cruciform mark towards the 

 apex. 



HETERODERES. 



Heteroderes, Latreille, Ann. Soc. Ent. Fr. 1834, p. 155 ; Candeze, Monogr. Elat. ii. p. 350. 



The species included under this generic name by Candeze differ from Monocrepidius 

 in having a double system of punctuation on the thorax — the interspaces between the 

 larger punctures being densely and very finely punctured, — and in some cases on the head 

 and under surface also. About eighty species of Heteroderes are known, the majority 

 of which are from the Old World. The genus is not adopted by Leconte and Horn. 



