and Central American Telephorinae. 129 



perfectly with that of the present genus, and differing 

 greatly from that of Lobetus, Kies., type L. torticornis, from 

 Colombia. Trypherus, Lee, type MaUhinus latipennis. 

 Germ., from N. America, two females of which are avail- 

 able for comparison, has a broader, flatter, basally narrowed 

 head, more widely separated eyes, and a less developed 

 terminal segment to the abdomen.* Amongst the seven 

 Mexican or Central American Ichihyuri before me, five are 

 represented by females only. Males of the E. African 

 I.forcipiger, Gestro (= apicalis, Motsch.), and the Mexican 

 /. dichelifer have been dissected for comparison, and they 

 prove to be very closely related. Malthinus (Biurus) 

 elegans, Guer., from Brazil, is obviously an Ichthyurus, $. 



1. Ichthyurus dichelifer, n. sp. (Plate III, figs. 14, 14a, $.) 



Nigro-piceous or piceous, the base of the antennae, the basal half 

 or more of the femora, the margins of the abdomen, and the abdominal 

 forceps in part, flavous or testaceous ; the prothorax and elytra 

 yellow, the prothorax with a small oval spot on the disc and a 

 curved streak on each side of it, the latter often with a ramus 

 extending outwards, and the elytral suture rather broadly, piceous. 

 Head (fig. 14a) almost smooth, hollowed between the eyes above, 

 the latter very large in c^, a little smaller in $; antennae ((J?) 

 slender, about reaching the apex of the elytra, joint 2 one-half 

 the length of 3. Prothorax transverse, arcuate in front, the basal 

 and apical margins reflexed; closely, minutely punctate, the disc 

 arcuately depressed towards the base, and usually with a small 

 oblong tubercle in the centre of the depression. Elytra about twice 

 the length of the prothorax hollowed on their outer margin and 

 dehiscent from a little below the base, finely punctate, obliquely 

 grooved below the humeri and subcostate on the disc. 



(J. Terminal abdominal segment, dorsal and ventral, produced 

 on each side into a long, stout, somewhat curved, chitinous process, 

 the processes of the dorsal segment very stout, subcorneal, convex 

 above, and mucronate at the tip inferiorly, that of the ventral 

 segment shorter, narrower, and curved upwards (the two on each 

 side, as seen laterally, forming a pair of forceps); a long narrow 

 median rod, terminating in two slender, straight laciniae, protruding 

 between the two pairs of forceps (Plate VI, figs. 39, 39a) ; the two 

 segments preceding the terminal one somewhat elongated, and 

 rounded externally. 



* Numerous S. American species have recently been described by 

 Pic under Trypherus. 



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



