Mr. J. S. Baly on new species of Phytophagous Beetles. 195 



original author of T. Cutlerianus, which, though proved by me 

 to be a strict Trochus, has lately by some naturalists had attached 

 to it the generic title of Margarita Cutleriana. 



We beg that the figures of our species in the ' British Mol- 

 lusca/ plates 88 and 133, be carefully compared with Philippics 

 T. exilis, when it will be evident that they differ greatly : in pi. 88, 

 figs. 3 and 4, there is a fair representation, though largely mag- 

 nified, of the general aspect of my shell ; and fig. 4 shows por- 

 tions, pretty well delineated, of the two apertural sinuations I 

 have so particularly mentioned and insisted on : the figures of 

 pi. 132 are not so characteristic, and only feebly mark the sinuous 

 margin of the aperture. 



I am. Gentlemen, your most obedient Servant, 



Wm. Clark. 



XXIV. — Descriptions of new species of Phytophagous Beetles, 

 By J. S. Baly, Esq. 



[With a Plate.] 



The present paper contains the characters of upwards of twenty 

 new insects, principally belonging to the famihes Cassididce and 

 MegalopidcB. Amongst the most interesting are some very beau- 

 tiful species sent by Mr. H. W. Bates from the Upper Amazon. 

 The insects described, with a single exception, are in the cabinet 

 of the author, 



Crioceris scapularis. 



C. nigra, nitida ; elytris plaga magna humerali, nigro-notata, fulva. 

 Long. 3^ lin. 



Subelongate, shining black. Antennse moderately robust, 

 rather more than half the length of the body, subfiliform ; four 

 basal joints shining, the rest opake. Thorax as long as broad, 

 cylindrical, slightly flattened above, sides deeply constricted in 

 the middle ; disk distinctly, but not very closely punctured, in- 

 distinctly depressed transversely just behind the middle. Scu- 

 tellum smooth, impunctate. Elytra oblong, much broader than 

 the thorax, convex, obsoletely depressed transversely below the 

 scutellum ; each elytron with eleven rows of regular punctures, 

 the first abbreviated, puncturing distinct and deeply impressed 

 at the base, finer and much less distinct towards the apex; 

 shining black, a large subquadrate patch at the base, extending 

 from the outer margin nearly to the suture, fulvous, the inner 

 edge sinuate, the lower margin deeply and irregularly notched ; 

 its surface marked with one or two small black spots. Beneath 

 shining black, covered with adpressed hairs. 



Hab, Northern China. Collected by Mr. Fortune. 



13* 



