300 RHYNCHOPHORA. 
decumbent set. Head and rostrum finely canaliculate, the rostrum broad, transverse, the scrobes 
short and converging posteriorly ; antenne stout, barely reaching the base of the prothorax, the scape 
not extending beyond the eyes, joint 2 of the funiculus shorter than 1, the club rather small; eyes 
comparatively small, depressed. Prothorax about as jong as broad, obliquely narrowed anteriurly, 
subtruncate at the base, obsoletely canaliculate, sloping and somewhat hollowed towards the sides 
(appearing fairly margined posteriorly), finely punctate. Scutellum transverse. Elytra subparallel in 
their basal half in ¢, gradually widened to the middle in 2, subtruncate at the base, the humeri rather 
prominent ; finely punctate-striate, the interstices feebly convex. Legs moderately stout. 
Length 44-63, breadth 13-23 millim. (d ¢ -) 
Hab. Mexico, Presidio and Milpas in Durango (Forrer), Lerdo (Fenyes, ex coll. 
Bovie), La Noria in Sinaloa (H6ge), Matamoros Izucar and Tehuantepec (U.S. Nat. 
Mus.). 
Numerous examples, varying in size and in the extent of the brown markings on 
the upper surface, these being almost obsolete in some specimens. ‘The somewhat 
explanate sides of the prothorax, the subtruncate base of the elytra, and the smaller 
eyes separate A. submarginatus from A. angularis. ‘The falciform deciduous portion 
of the mandible is acute at the tip. 
Section 11.—Ocular lobes well developed *. 
Group ENTIMINA. 
Entimides, Hypsonotides, and Promécopides, Lacordaire. 
Promecopini, Horn. 
Under this group are placed all the genera with broad, well-developed ocular lobes 
to the prothorax, laterally placed scrobes, and fully developed wings; these latter, 
however, are rudimentary or wanting in Pseudhypoptus. The “ Entimides” and 
‘‘Hypsonotides” are poorly, and the ‘‘Promecopides” very well, represented in 
Central America. ‘The eight genera belonging to our region may be tabulated thus :— 
a. Antennal club oblong or elongate ; rostrum short, broad, strongly 
dilated anteriorly ; elytra very broad, triangular. [EntTimipzs, 
Lacord. | 
a}. Tarsal claws free ; eyes distant; humeri angularly projecting : 
species very large . 2. . - «© «© «© «© © « «© «© . « « Entimus, Schonh. 
b’. Tarsal claws connate at base; eyes subapproximate; humeri 
not projecting laterally: species smaller. . . . . . . . Cypranrrus, Schénh. 
b. Antennal club ovate or oblong-ovate ; elytra narrower. 
c’. Rostrum longer and narrower; tarsal claws free. | [Hypso- 
notipEs, Lacord.] 
a’. Humeri prominent; scutellum larger; ocular lobes not ex- 
tending inferiorly; wings fully developed . . . . . . Hypoprus, Lacord 
° ° , ° 
b?. Humeri not prominent; scutellum very small; ocular lobes 
extending inferiorly ; wings rudimentary or wanting . . . PszupHyPorrus, gen. nov 
* Cf. p. 178, anted. 
