_ CHELYMORPHA. 155 
14. Chelymorpha crux-nigra. 
Chelymorpha crux-nigra, Boh. Monogr. Cassid. iv. p. 218. 
Hab. Mexico (coll. Chevrolat 1). 
We have not received a specimen of this insect; but there is an example of it, 
doubtless the type, marked “ex Chevrolat,” in the Hamlet Clark collection of Cassidide, 
now in the National Museum. It is probably a variety of CO. juvenca. The elytra are 
sanguineous, with the suture, the exterior margin, and a median fascia black. 
15. Chelymorpha mexicana. (Tab. VII. fig. 9, 2.) 
Subovate (3), oblong ovate (2), moderately convex, glabrous, shining; rufo-testaceous or testaceous, the 
head, two small dots on the disc of the prothorax (often obsolete), and the scutellum, black; the elytra 
each with six or seven spots, and sometimes a narrow streak below the shoulder, and a common sub- 
quadrate or oval mark on the suture some little distance below the base, black, the spots placed thus— 
two a little below the base (one on the humeral callus, the other lower down and midway between it and 
the sutural mark), three in a transverse row about the middle (the inner one transverse, near the suture, 
the outer one on the margin and in front of the other two), one, usually small, on the disc midway 
between the inner one of these and the apex, and sometimes one close to the margin behind this; the 
antenne, legs, and under surface black, the antenne with joints 1-5 more or less rufo-testaceous beneath. 
Head coarsely, rugosely punctured and sharply canaliculate between the eyes, the groove limited on 
either side by a smooth cariniform elevation, the lower part with coarse separate punctures; antenne 
rather stout, scarcely reaching to the base of the prothorax, the five basal joints shining and almost 
smooth. Prothorax convex, twice as broad as long, broadly arcuate-emarginate in front, the sides rounded 
almost from the base (more strongly so in the male) and rapidly converging from the middle forwards, 
the base deeply emarginate on either side externally, the median lobe broad and obtuse, the hind angles 
sharp and produced behind; the disc with an interrupted median groove, sparsely, very finely punctate ; 
the margins moderately expanded, deflexed, coarsely, confluently punctate, the outer edge not thickened. 
Scutellum transversely triangular, smooth. Elytra moderately convex, somewhat flattened on the disc 
anteriorly, in the ¢ about three, in the @ fully three and a half, times as long as the prothorax, at the 
base not wider than it, slightly dilated at the middle, the sides obliquely converging thence to the base 
‘in the ¢, gradually converging in the 9, the humeri obtuse and embraced by the hind angles of the 
prothorax, the apices conjointly rounded ; the margins moderately expanded and strongly deflexed; the 
entire surface closely, finely punctate, the punctures on the margins closer and finer than those on the 
disc. Beneath glabrous, smooth, the metapleure coarsely rugose; prosternum shallowly sulcate poste- 
riorly. Claws appendiculate. 
Length, § 9, 9-114, breadth 6-73 millim. 
_ Hab. Mexico, Guanajuato (Sallé), San Juan del Rio (Hoge). + 
| . Numerous examples. Closely allied to C. biannularis, but evidently distinct from 
that variable insect. The elytral spots are small and show no tendency to coalesce, 
the external one of the posterior two being often obsolete. 
16. Chelymorpha biannularis. (Tab. VII. tigg. 10,3; 11, ¢, var.) 
Chelymorpha biannularis, Boh. Monogr. Cassid. ii. p. 66 ', andiv. p. 215°; Cat. Col. Ins. Brit. Mus. 
ix. p. 82°. 
Chelymorpha fasciata, Boh. Cat. Col. Ins. Brit. Mus, ix. p. 77+; Monogr. Cassid. iv. p. 203°. 
Chelymorpha 10-punctata, Sturm in litt.° 
Hab. Mexico !~ (Sallé, ex coll. Sturm), Ventanas in Durango, Mazatlan, Tacambaro 
