_COPTOCYCLA. . 189 
with the apical four joints piceous or black; beneath black, the sides of the ventral segments sometimes 
rufo-testaceous; the legs varying in colour from rufo-testaceous to nearly black. Antenne scarcely 
extending beyond the base of the prothorax, with joints 7-11 rather stout, 3 and 4 elongate, subequal, 
each nearly twice as long as 2, 5 and 6 each shorter than 4, 8-10 almost as broad as long. Prothorax 
nearly twice as broad as long, moderately expanded at the sides and in front, deeply sinuate at the base 
on either side of the broadly truncated median lobe, the latter unimpressed, the surface almost smooth. 
Elytra considerably wider than the prothorax, broader in the male than in the female, subparallel nearly 
to the middle, deeply sinuate-emarginate at the base; the disc with rows of rather fine subapproximate 
punctures extending tu the apex and a deep sutural stria, the interstices smooth, flat; the margins mode- 
rately expanded, becoming very narrow at the apex, deflexed, smooth, the outer edge scarcely thickened ; 
the humeri anteriorly prominent, but obtuse. Claws simple. 
Length 54-64, breadth 4-44 millim. 
Hab. Mexico, Puebla, Matamoros Izucar (Sallé). 
Two examples. C. azteca is intermediate as it were between C. trisignata, Boh., and 
its allies, and the North-American Cassida nigripes, Oliv. In the form of the antenne 
it agrees better with Coptocycla than with Cassida. It may be known from C. nigripes 
by its much smaller size, and by the expanded margins of the elytra being much 
narrower at the apex, more deflexed, and with the exterior edge scarcely thickened. 
The disc of the elytra is very faintly impressed between the anterior spots, but 
it cannot be described as foveate. The spots are Jarger than in C. trisignata and 
differently placed. 
11. Coptocycla annulus. 
Cassida annulus, Fabr. Spec. Ins. i. p. 109 (1781)'; Gmelin, Syst. Nat. i. 4, p. 1637. 
Coptocycla annulus, Boh. Monogr. Cassid. iii. p. 236°, and iv. p. 480‘; Cat. Col. Ins. Brit. Mus. 
ix. p. 173°. | 
Cassida circularis, Oliv. Ent. vi. no. 97, p. 970, t. 6. £. 98°. 
Coptocycila circularis (Oliv.), Dej. Cat. 3rd edit. p. 3896". 
Coptocycla circulifera, De}. Cat. loc. cit.° 
Hab. Mexico, Playa Vicente, San Andres Tuxtla (Sal/é), Teapa in Tabasco (H. H. 
Smith); Guatemata4®, Panzos, Teleman, Senahu, and San Juan in Vera Paz, Zapote 
(Champion); Nicaragua, Chontales (Belt, Janson); Panama (Boucard), Bugaba, 
Volcan de Chiriqui, Caldera, David (Champion), Chiriqui (Ribbe).—CoLomBia **°; 
Guiana, Cayenne !-8; Ecuapor; Amazons, Pard°, Ega; Boxivia 4°. . 
A widely distributed and rather common Tropical-American insect. In this species 
the yellow annulus of the elytra is small, not reaching the middle, and followed by a 
similarly coloured curved fascia, the rest of the disc, the apex excepted, being black, 
the prothorax also with a black basal patch. The antenne are very elongate and 
slender, the third joint elongate, joints 6-11 piceous or black. | 
BIOL. CENTR.-AMER., Coleopt., Vol. VI. Pt. 2, April 1894. bb 
