1880.] MR. M. JACOBY ON PHYTOPHAGOUS COLEOPTERA. 607 



black ; elytra finely rugose, punctate, and pubescent, metallic blue or 

 violaceous. 



Length 6-7 lines. 



Head convex, with a more or less distinct central groove, finely 

 punctate. Third joint of the antennae very long, and much longer 

 than the two preceding ones, rest of the joints closely covered with 

 whitish pubescence. Thorax but moderately constricted near tbe 

 base, rather obsoletely transversely grooved on the disk ; impunctate, 

 shining flavous. Scutellum subquadrate, black, distinctly punctate. 

 Elytra convex and parallel in the male, or slightly constricted at the 

 middle, finely rugose, punctate, and covered with thin whitish hairs, 

 dark blue or violaceous. 



The black abdominal last segment and the tibise, as well as the 

 black scutellum and the fine pubescence of the elytra, distinguish 

 this species from C. violaceipennis, Clark. Except in the colour of 

 the elytra, all the specimens before me resemble each other per- 

 fectly. 



85. CCELOMERA RUFICOLLIS, Oliv. 



86. CcELOMERA CAJENNENSIS, Fabf. 



Genus Malacosoma, Chevrol. 



87. Malacosoma olivaceum, Fabr. 



88. Malacosoma obsoletum, Fabr. 



Genus Dircema, Clark. 



89. DiucEMA rufipennis, sp. nov. 



Fulvous below ; head and antennae black, last five joints of the 

 latter flavous ; thorax transversely sulcate, rufous, shining ; elytra 

 finely punctate and pubescent, rufous. 



Length 5 lines. 



Head swollen, longitudinally impressed between the antennae, 

 finely punctured at the same place, black ; lower part of the epistome 

 and margin of the labrum more or less testaceous ; palpi flavous ; 

 antennae black, extreme base of the first and the last five joints 

 flavous. Thorax narrowly transverse, the sides greatly widened and 

 rounded near the apex ; disk broadly transversely sulcate, very re- 

 motely but distinctly punctate, with a few yellowish hairs ; rufous, 

 very shining. Scutellum pubescent, rufous. Elytra parallel, convex, 

 of a lighter rufous than the thorax, and less shining, closely punc- 

 tured, and finely covered with yellow hairs. Entire underside and 

 the legs pale fulvous. 



Easily distinguished from any other species of this genus by the 

 rufous colour and glossy appearance of its upper surface. 



Genus Monocesta, Clark. 



90. Monocesta dimidiata, Jacoby, P. Z. S. 1877, p- 520. 

 Also found in Peru. 



