6 RHYNCHOPHORA. 
We have received only two examples of this insect; they are males, and the pecu- 
liarity of the antenne by which the species may be distinguished from all others of the 
genus is perhaps less marked in the other sex—the ninth and tenth joints are each 
about as long as the four preceding joints together, while the terminal joint is small and 
acuminate, and subconstricted in the middle. In general form A. heterocerus somewhat 
resembles A. corvinus, but it has a more conical thorax. The head is elongate, and the 
rostrum short, hardly so long as the head; the eyes only moderately convex, rather 
widely separated, the space between them depressed, feebly carinate in the middle. 
Thorax rather long, subconical, almost smooth, there being only a slight sculpture 
along the base. Elytra with a subobsolete, rather scanty, diffuse punctuation, and also 
with series of fine, distant punctures, quite obsolete towards the apex ; the sutural series 
is more distinct than the others, but does not reach the apex, and the outer series are 
so indistinct that they can scarcely be perceived even at the base. The scutellum is 
much narrower than it is in A. corvinus. 
13. Attelabus corvinus. 
Attelabus corvinus, Gyll. in Schénh. Gen. et Spec. Cure. v. p. 304°. 
Hab. Mexico, between Oaxaca and Acapulco}, Atoyac in Vera Cruz (H. H. Smith), 
Ventanas in Durango, Juquila, Tapachula (Hoge), Toxpam (Sallé); British Honpuras, 
R. Hondo (Blancaneaux); GuatemMata, El Tumbador, Las Mercedes, Cerro Zunil, 
Zapote, Capetillo, Duefias, Purula, Chacoj (Champion), Panzos (Champion, Conradt), 
Coban (Conradt) ; Nicaragua, Chontales (Belt); Cosra Rica (Van Patten) ; 
Panama, Volcan de Chiriqui 3000 feet (Champion).—Soutn America, Colombia (coll. 
Gorham). 
There are important differences between the sexes of this species, the front legs and 
the thorax, and the various parts of the head, including even the eyes and the antenne, 
being longer in the male than in the female: in the former sex the strongly curved 
front tibie have a single mucro at the apex, and the apex of the rostrum is strongly 
bidenticulate beneath ; in the female the front tibize are bimucronate. 
A. corvinus appears to be abundant in Guatemala, but from Mexico we have received 
only seven examples, and only a single individual from each of the more southern 
provinces. 
14. Attelabus lesicollis. (Tab. I. figg. 5, 5a, ¢.) 
Aitelabus lesicollis, Gyll. in Schénh. Gen. et Spee. Cure. v. p. 305°. 
Hab. Mexico (coll. Chevrolat+), Tacambaro, Acapulco (fége); GuaremaLa, San 
Geronimo (Champion). 
Gyllenhal’s description was taken from one male example, and the characters he 
gives are in part applicable only to that sex. A. lwsicollis in both sexes may be dis- 
