198 Zoologica: N. Y. Zoological Society [HI; 7 



A. — The Family Cucujidae (authorum) . 



The larvae of Coccidotrophus socicUis Schw. & Barb, and 

 Eunausibius ivheeleri Schw. & Barb, show remarkable identity 

 in general morphological structures with the larvae of the genera 

 Oryzaephilus Gangl., Silvanus Latr., Nausibius Redt. and Cathar- 

 tus Reiche. All these forms differ from each other only in small 

 details such as the proportional length of the second antennal 

 joint, the arrangement of the individual ocelli in the two ocellar 

 groups, the thickness and color of the chitin of the body or the 

 number and development of the tergal setae. The larva of 

 Telephamis (Plate X, figs. 34-38) has a well developed third 

 antennal joint and differs in this and some other less important 

 characters from the genera mentioned. However, it approaches 

 them closely and constitutes together with them a well defined 

 taxonomic unit distinct from the larvae of the rest of those genera 

 which have generally been combined into the single family Cucu- 

 jidae. 



This family, however, as hitherto limited, mainly on adult 

 characters, includes larval types which are rather heterogeneous ; 

 and according to these different larval types the family can be 

 divided and I propose here to divide it, into several new families 

 and subfamilies. 



Thus it appears appropriate to establish the above mentioned 

 unit of genera as a distinct family, the Silvanidae. 



This family is, through the genus Telephanus, closely associ- 

 ated with another unit of genera, namely Brontes Fabr. and 

 Dendrophagus Schon. (by Gilbert F. Arrow 1901 united into a 

 single genus Hyliota Latr.), Psammoecus Latr., Pediacus Shuck, 

 Platisus (according to description and figure by A. M. Lea of 

 P. integricollis Reitter; Proc. Linn. Soc. N. S. Wales, vol. 29, 

 1904, p. 88) and Cucujus Fab., which together form a second 

 family, the Cucujidae (in restricted sense) with Brontes, Dendro- 

 phagus, with Psammocus in one subfamily, the Hyliotinae, and 

 the other genera in another subfamily, the Cucujina'e. More re- 

 mote is the relationship between these two families and the genera 

 Prostomis Latr, and Dryocora (according to my own unpublished 



