NORTH AMERICAN COLEOPTRRA. 97 



DYSMKRlJSn. -...i. 



This genius is ibunded upon a very singular insect collected by .Mr. 

 Schwarz in Florida ; the specimen is probably a male, and is nnitnie. It 

 differs from Lffinophhrxs in the following particulars : 



Second juint of auteiiiiae joined laterally to the first, vvliicli is of anomalous 

 form. Outer joints not liattened ; last joint wanting the terminal process, which 

 is almost universal in LoEmoph/oeus. 



Although most closely allied to the above-mentioned genus, I feel war- 

 ranted in separating it on account of the mode of attachment of the 

 second joint of the antennae to the first, it being unlike anvthin<; exist- 

 ing in that genus, where the .second joint is always joined to the apex of 

 the first. 



1. D. basalis n. sp. — Form elongated, very narrow, moderately depressed; 

 sides parallel. SurAice of head and prothorax covered very scantily with pubes- 

 cence, and coarsely and rather closely punctured; elytra striate. Color ferrugi- 

 nous or dark reddish testaceous. Head elongate; eyes small, but prominent; in 

 advance of posterior angles. Prothorax as broad as line across the eyes, as long as 

 head and narrowed very slightly behind; sides straight; lateral striae apparent; 

 anterior and posterior angles right. Scutellum very small and transverse. Elytra 

 of same width as prothorax. longer than one-half of tlie body, entire, and rather 

 obtusely rounded behind: sides parallel and straight; but sliglitly bordered. Ab- 

 ilominal segments equal and very short. Antennae nearly equal in len"-th to 

 head and prothorax together; first joint of very abnormal shape, one-half as lono- 

 as the prothorax, and ciliated at its anterior tip, the second small sub-globular and 

 affixed to the side of the first, third to eighth still smaller, equal and globular, 

 joints nine to eleven much larger than the eighth, apparently not flattened : last 

 joint ovulate. Length 1.7 mm. 



Phite VII, Fig. 12. 



The manner of connection of the first and second joints of the an- 

 tennae forcibly reminds us of certain insects of the genus Tesserocerm 

 in. the Platypides, the first joint, however, in the latter genus is much 

 more slender and prolonged farther beyond the point of juncture. 



Triiie II. — Brontim. 



This tribe contains but two genera, and three species which resemble 

 greatly their European representatives ; the genera may be separated as 



follows : 



Sides of prothorax entire: anterior angles rounded:" mesosternum truncate in 

 front Deiidrophagus. 



Sides of prothorax strongly and minutely serrate; anterior angles stronglv 

 tootlied : mesosternum enuirginate in front Brontes. 



TRANS. AMKK. KNT. SOC. XI. (25) FKBltUAUY. 1884. 



