208 PROCEEDINGS OP THE ACADEMY OF 



2. C. furcata Dej., Cat. 403. Galeruca furc. Oliv., Ent. vi. 643, (No. 

 93, 48,) pi. 3, f. 50. 



Unknown to rne. Olivier mentions the locality as doubtful, and describes 

 the thorax as having a transverse impression. I think that the reference to 

 the present genus is therefore incorrect, and that Dejean probably had in view 

 a variety of C. c a na i n e a , in wnich all the spots except the apical one were 

 confluent. 



MALACOSOMA Rosenhauer. 

 Easily distinguished from the other genera by the prosternum being pro- 

 longed between the front coxae, which are thus separated by a narrow interval. 

 The first joint of the antenna? is moderate, the 2d one-half as long as the 3d, 

 which is equal to the 4th. The body is elongated, convex, glabrous, and 

 nearly smooth above ; the epipleurae are well defined, and extend the length 

 of the elytra. 



1. M. fuscula, fusca, vel fusco-testacea, subnitida, thorace convexo, 

 quadrato, ad basin rotundato medio subemarginato, angulis posticis parvis 

 prominulis, disco alutaceo, parce subtiliter punctulato, elytris fere obsolete 

 punctulatis. Long, "12 *15. 



Pennsylvania, Illinois and Kansas. The head is marked between the eyes 

 with two curved deeply-impressed lines, which limit small tubercles ; in front 

 of them, and between the antennae is a short elevated ridge ; the space before 

 the antennae is uneven, but scarcely punctured. Antennae half as long as the 

 body. Palpi darker at the tip. Thorax quadrate, scarcely wider than its 

 length, sides converging slightly in front, apex truncate, anterior angles 

 rounded, base broadly rounded, slightly emarginate at the middle, hind angles 

 small, laterally prominent ; disc convex, transversely impressed near the base, 

 finely shagreened with very small scattered punctures. Elytra wider than 

 the thorax, and about four times as long, sides parallel ; transversely convex, 

 vaguely impressed near the base, surface not very shining, feebly and almost 

 obsoletely punctulate, without brilliant reflexions. Beneath colored as above. 

 In the male the 5th ventral segment is excavated, and furnished with a large, 

 flat appendage, which is broadly and obtusely truncate at tip, and projects 

 over the 6th segment. In two specimens (males) from Illinois the thorax is 

 vaguely channelled. 



2. M. tincta, testacea, nitida, elytris punctulatis, viridi-cyaneo suffusis, 

 sutura margineque anguste testaceis. Long. *12 - 15. 



Two specimens from Quincy, Illinois, given me by Mr. Willcox. This 

 species is of the same form and size as the preceding, but differs by the elytra 

 being distinctly but finely punctured, with a beautiful bluish-green gloss, 

 which fades insensibly into testaceous at the suture and margin. 



The 5th ventral segment of the male is deeply emarginate, and the process 

 is narrow and acute, instead of broad and truncate, as in M. fuscula. 



PHYLLOBROT1CA Redtenbacher. 



Among the genera with the claws dilated at the base into a broad tooth, 

 this will be easily known by the side margin of the elytra being entirely 

 wanting ; the epipleurae are consequently not defined. The body is elongate, 

 k glabrous and nearly smooth above, the thorax quadrate, truncate in front. 

 The antennae are moderately long, with the 2d joint about half as long as the 

 3d, which is equal to the 4th. The maxillary palpi are stout, with the last 

 joint conical, as long as the preceding. 



1. P. decorata Lee, Say'a, Ent. writings, ii. 203. Galleruca dec. Say, 

 Journ. Acad. Nat. Sci Phila., iii. 459 ; ed. Lee. 1. cit. Gall. Olivieri Kirby, 

 P'auna Bor. Am. iv. 218. 



Canada, Lake Superior, Illinois ; rare. In the male, the 5th ventral seg- 

 ment is very large, canaliculate, deeply excavated behind, with a small testa- 



[Oct. 



