Mr. Gr. C. Champion's Revision of Telephorinae. 17 



Maltliodes) present in the (^ armature. In Podabrus there 

 is an additional exposed ventral segment, the ninth segment 

 has symmetric lateral lobes, and the membranous internal 

 sac, when seen evaginated (Plate IV, fig. 2), is apparently 

 free from hooks or spines. In Maronius and Belotus, genera 

 with greatly abbreviated elytra and tubuliform processes 

 along the margins of the abdomen, the genital armature 

 is highly developed and asymmetric, and very like that 

 of the ChauliognatJdnae. 



The Silini may be grouped by the form of the tarsal 

 claws, and the position of the lateral incisions of the pro- 

 thorax, in the males. The species mimicking Lampyrids 

 and Lycids are, as usual, difficult to locate till their 

 structural characters have been examined. 



The consecutively numbered illustrations on Plates 

 IV— VII, figs. 1—49, show the evaginated and non-evagin- 

 ated condition of the (J genital armature — the tips only 

 of two or four spines being visible in the distal opening of 

 the internal sac in most specimens of the dried insects — ■ 

 the form of the seventh, eighth, or ninth ventral segment, 

 etc. The descriptions of the armature are taken from 

 dried examples, and are therefore incomplete. With one 

 exception, the whole of the species of the subfamily 

 Telephorinae recorded by Gorham from Central America 

 in 1881-1885 were described as new. The 183 species 

 now enumerated from the same region include 72 novel- 

 ties and 11 forms added by Pic during recent years. 

 Three new genera are also characterised. 



Subfam. TELEPHORINAE. 



Group Telephorini. 



The group including TelepJiorus, Rhagonycha and alhed 

 forms is represented in Mexico by the genus Podabrus, which 

 is characterised by the undivided, exposed terminal ventral 

 segment of the male, the symmetric genital armature, and 

 the toothed or cleft tarsal claws and simple prothorax 

 in both sexes. Discodon is closely related to Polemius 

 and Silis, and must be placed in the same group. Plectono- 

 tum, included in the Silini by Gorham, has the thickened 

 lateral margin of the prothorax abbreviated before the 

 base, but it agrees in other respects with the Telephorini, 

 and seems best placed here. It is probable that nearly 



TRANS. ENT. SOC. LOND. 1915. — PART I. (mAY) C 



