COMPSUS. 289 
2. Compsus auricephalus. (Tab. XIII. figg. 17, 2; 18, 3, var.) 
Curculio auricephalus, Say, Journ. Acad. Phil. iii. p. 8310 (1828) *. 
Platyomus auricephalus, Boh. in Schénh. Gen. Cure. i. p. 645°. 
Compsus auricephalus, Horn, Proc. Am. Phil. Soc. xv. p. 88°; Pierce, Proc. U.S. Nat. Mus. 
xxxvil. p. 360*; Mitchell and Pierce, Proc. Ent. Soc. Wash. xiii. p. 48°. 
Compsus auriceps, Boh. op. cit. vi. 1, p. 183°. 
Platyomus auriceps, Labr. et Imhoff, Gen. Cure. ii. t. 52". 
Compsus venustus, Chevr. in litt.’. 
Length 74-124, breadth 23-5 millim. (d 2.) 
Hab. Nortu America, Mississippi! ?4°*, Arkansas, Georgia ®, Texas + ®, Arizona 4.— 
Mexico?®? (Mus. Brit.), Monclova in Coahuila (Dr. Palmer), Victoria, ‘Tampico 
(Schwarz, in U.S. Nat. Mus.), San Rafael Jicaltepec (Townsend, in U.S. Nat. Mus.), 
Oaxaca (Sallé, Hoge). 
Var. More elongate ; the elytra more produced and acuminate at the apex, the alternate interstices costate 
throughout ; the vestiture white, greenish, or pale brown. 
Length 9;,-16#, breadth 3-63 millim. (d Q.) 
Hab. Mexico, Acapulco (Hoge); Guatemata, Tactic in Alta Vera Paz (Conradt) ; 
NicaraGua, Chontales (Belt); Costa Rica, Boca del Limon (Pittier), Cangrejal de 
Aserri (Biolley), Atenas (U.S. Nat. Mus.) ; Panama, Caldera, Petia Blanca (Champion). 
The specimens of this species before me (including a long series from Tampico) 
vary greatly in size and in the colour of the scales—from green to white or pale 
brown, the head, rostrum, and legs being often cupreous in the green typical form. 
The southern examples are more elongate, uniformly white or brownish *, and have 
the alternate elytral interstices 3, 5, and 7 strongly costate and the apices more 
produced; but they are connected with C. auricephalus by intermediate forms. The 
prothorax is trisulcate, and often more widened posteriorly in the female than in 
the male; the eyes, too, are sometimes rather depressed in the former sex. Found on 
Phoradendron, Ambrosia, Gossypium, and Acacia °. 
3. Compsus nigropunctatus, sp.n. (Tab. XIII. fig. 19.) 
Elongate, black, densely clothed (the punctures included) with chalky-white scales, the elytra each with three 
or four small bare black spots—-one on the fourth or fifth interstice below the base (sometimes obsolete), 
one at the middle of the disc, one in a line with it on the outer margin, and one on the third interstice 
towards the apex,—the prothorax also sometimes with three or five small black spots (three on the 
anterior margin and one on each side of the disc towards the base). Rostrum hollowed and obsoletely 
sulcate anteriorly, the upper portion obliquely divergent on each side in front, the scrobes descending 
for a short distance before the eyes, the latter rounded and convex; antennal scape reaching to a little 
beyond the eyes. Prothorax transverse, deeply bisinuate at the base, slightly rounded at the sides, 
broadly flattened or hollowed down the middle. Elytra elongate-triangular, flattened on the disc, lobed 
at the base, acuminate at the apex, the apices dentiform ; with rows of fine, subapproximate punctures 
placed in very shallow fovex, the third interstice gradually becoming more raised to the apical declivity 
and then abruptly declivous, the fifth also raised posteriorly and the seventh anteriorly. 
Length 12-15, breadth 45-53 millim. (?2.) 
* Probably discoloured, as may be the case in C’. csabellinus, Boh. 
BIOL. CENTR.-AMER., Coleopt., Vol. IV. Pt. 3, October 1911. 2 Pp 
