1885.] MR. JACOBY ON NEW PHYTOPHAGOUS COLEOPTERA. 92.) 



did not show this supposition to be erroneous. The extreme deli- 

 cacy and fragility of the specimen has unfortunately resulted in the 

 loss of nearly all the appendages, and the specimen is broken in half. 

 It is not merely, however, the thinness and absence of calcification 

 iu the integument that makes this species so brittle ; the muscles, 

 both of the appendages and of the segments themselves, are so little 

 developed that it is almost impossible to detect their presence with 

 the unaided eye. This is the only family of Isopods in which I 

 have observed a similar feeble development of the muscidature, which 

 is well known to be characteristic of many deep-sea fishes. Eury- 

 cope fragilis approaches E. j^ellucida in the transparency of the 

 integument, and in the third species, E. abyssicola these peculiarities 

 are even more developed ; the specimen, however, is so collapsed 

 and damaged that it is impossible to say much about it. 



4. Descriptions of some new Species and a new Genus of 

 Phytophagous Coleoptera. By Martin Jacoby. 



[Eeceived NoTember 27, 1885.] 



DORYPHORA PR^TEXTATA, Sp. UOV. 



Below piceous ; above pale green. Head and the disk of the 

 thorax piceous, closely punctured ; elytra closely geminate, punc- 

 tate-striate, a sutural stripe widened at the middle, piceous. 



Length 4^ lines. 



Head finely and closely punctured ; labrum fulvous ; antennae 

 black, the three lower joints testaceous below, the apex of the ter- 

 minal joint fulvous. Thorax very finely and rather closely punc- 

 tured, the sides slightly rounded in front, nearly straight at the 

 base, the angles acute but scarcely produced : a large piceous patch, 

 widened at the base, occupies the middle of the disk. Scutellum 

 piceous. Elytra rather finely punctate-striate; the punctures 

 arranged in slightly irregular double rows, with the exception of the 

 last row, near the lateral margins, which consist of single punctures 

 only ; the sutural longitudinal piceous stripe is distinctly widened at 

 the middle, and gradually narrows towards the apices ; the meso- 

 sternal process short and straight. 



Hdb. Amazons, St. Paulo d'01iven9a. (Coll. Oberthiir and my 

 own.) 



This species may easily be mistaken for a variety of D. trivittata, 

 Baly, in which the lateral elytral stripe is wanting; but the double 

 rows of punctures of the elytra show it to be distinct. In D. trivit- 

 tata, as well as in D. citrinella, Kirsch, tlie elytra have single rows 

 of punctures ; the same is the case in D. vespertina, Baly, another 

 closely allied speiies. 



DoRYPHORA GR.ATIOSA, Sp. nOV. 



Bliick. Head, thorax, and antennae dark piceous, the four last 

 joints of the latter fulvous ; elytra pale green, finely punctate-striate, 

 Proc. Zool. Soc— 1885, No. LX. (JO 



