u8 MEMOIRS ON THE COLEOPTERA 



tarsi are nearly as in the preceding tribe, 4-jointed, with a very long 

 terminal joint. There are rather numerous species of Lathropus, of 

 which a few believed to be new are described further on. Some 

 doubt may arise as to the authorship of L. vernalis, named in manu- 

 script by Zimmermann. The name was adopted by LeConte for 

 a species to which he had called attention but failed to describe 

 (Proc. Acad. Sci., Phila., 1866, p. 379), and the description given 

 by the writer under LeConte's name (Tr. Am. Ent. Soc., 1884, p. 95) 

 appears to have been the first to be published. 



CUCUJINI. Includes the largest species of the subfamily, all very 

 depressed, the elytra dorsally prominent sublaterally, with the flat- 

 tened or concave inner part even and unstriated, though sometimes 

 with a few fine raised threads, and the antennae non-clavate and 

 generally moniliform. The tribe will include Cucujus Fabr., 

 PalcBStes Perty, Platisus Erich., Pediacus Schuck., and probably 

 some others. Pediacus, with its shorter and clavate antennae, 

 constitutes the same kind of exception in the Cucujini, that Dysmerus 

 and Leptophlosus do among the genera of Laemophloeini. 



L/EMOPHLCEINI. This tribal group includes a great diversity in 

 external form and in the antennae, from long and finely filiform to 

 short, loosely clavate and silvaniform, but there is a community of 

 habitus that is unmistakable. The elytra vary from very short as in 

 Inopeplus, to longer, though leaving the abdomen partially exposed 

 as in Silvanophlceus, to an elongate form, completely covering the 

 abdomen, as in most of the other genera. The anterior coxal 

 cavities are not quite closed behind in most of the genera, but the 

 opening is extremely narrow in some; in others the closure is virtu- 

 ally complete. The genera of the Laemophloeini are numerous and 

 those in my collection may be separated as follows : 



Antennae long and filiform, more or less decidedly shorter in the female, 

 where there is generally an obvious 3-jointed and claviform though 

 feeble expansion distally, this being sometimes manifest also in the 



males 2 



Antennae short, compact, with a 3-jointed club as in Silvanus; body very 



slender and parallel; eyes small and subbasal 7 



2 Elytra very short, leaving most of the abdomen exposed hind body 

 more broadly expanded than in any other genus, very depressed, 



feebly sculptured Inopeplus Smith 



Elytra longer, covering all or most of the abdomen 3 



3 Scutellum large, semicircular or broadly angulate, never very short. .4 

 Scutellum very short and transverse 6 



