202 Zoological N. Y. Zoological Society [HI; 7 



with broad ligula ; without or with slightly indicated paraglossae ; 

 two jointed labial palp. Mentum — probably fused with submen- 

 tum — large, oarrelshaped, at base attached to maxillary articu- 

 lating area, otherwise free. Gala large, hexagonal, transverse, 

 interposed between postmaxillary margins of epicranium, the 

 mental-submental area and the anterior prothoracic region. 



Apart from the above mentioned, particularly close associa- 

 tion with several genera of the old family Cucujidae, the 

 Silvaninae also exhibit a pronounced relationship to the genera 

 of the family Cryptophagidae, to the Monotomidae as represented 

 by the larva of Europs pallipennis Lee. and to the genus Languria, 

 which together with a few other genera, according to the larval 

 structures, may constitute a distinct family. These larvae have 

 all, like those of the Silvanidae and Cucujidae (restricted) a 

 normally chitinized mandible (compare the Lathridiidae) and a 

 simple and falciform maxillary mala; but they differ from the 

 Silvanid and Cucujid larvae in having bifore spiracles. 



B. 2. — The Genera of the Silvaninae Systematically Defined by 

 Larval Characters. 



The Silvaninae are represented in the collections of the U. S. 

 National Museum by the larvae of Carthartus advena Waltl, 

 Nausibius clavicornis Kugelann, Silvanus quadricollis Guerin, 

 Oryzaephilus surinamensis Linnaeus, Coccidotrophus socialis 

 Schwarz and Barber, and Eunausibius wheeleri Schwarz and 

 Barber. 



follows 



)er. 



The genera which these larvae represent can be separated as 

 ws: 



1. Second antennal joint as long as head (Plate VIH, 



fig. 12) Cathartus Reiche 



Second antennal joint half as long as head or 

 shorter 2 



2. Second antennal joint half as long as head; upper 



ocellar group with four ocelli, lower group with 

 two ocelli, or individual ocelli of each group 

 confluent 3 



