288 MR. B. F. CUMMINGS ON LICE 



middle condyle is the same as in the idght, and the socket at the 

 external angle is somewhat deeper. Two very distinct apices 

 are present, situated laterally one to the other, the longer one 

 separated from the shorter by a considerable space. Ridges in 

 both mandibles absent. First Maxilice : These lobes call for no 

 special mention. Labium: " Paraglossse " as usual; anterior 

 margin is concave in the middle with a small convex swelling 

 on each side carrying four or five spines. On the dorsal surface 

 of the labium, i. e. within the oral opening, is visible a sclerite 

 of the same shape and in the same position as that described in 

 Trichodectes gastrocles (16, p. 99). It consists of a transverse 

 band with two limbs at each extremity, one anterior and one 

 posterior. The posterior one in this case is very long, and runs 

 back on the inside of the under surface of the labium almost as 

 far as the hind end of the "gland" or basal piece. The anterior 

 one is noteworthy, as it runs forward a short way and then near 

 the base of the paraglossa runs into a dark brown chitinous nodule, 

 visible on the other side of the labium. Shipley (24) regards this 

 nodule described in G. tetraonis as a labial appendage. (Eso- 

 phageal sclerite : The text- figure shows the form of this organ in 

 this species. 



Male Copulatory Ap2X(,ratiis. — Mjoberg (4, p. 249, text-fig. 142) 

 has published a drawing of this apparatus which is so inaccurate 

 as to require, some time in the future, to be carefully refigured. 

 The morphology of the parts is more or less clear, there being 

 basal plate, parameres, endomeres, and penis, but the features 

 which make this relatively enormous apparatus so remarkable 

 are the strange and complex forms which the several parts have 

 ■assumed. 



GoNiODES BicusPiDATUS Piaget (2, p. 278). (Text-figs. 20-22.) 



Several specimens from Tragopan cahoti (Gould). 



A tube of the same species from Ceriornis satyrus, presented 

 to the Museum by Lord Rothschild, contained several larvte of 

 two stages, the description of which is included below. 



Male Copulatory Apparatus (text-fig. 20). — The following 

 description is drawn up from a specimen preserved in copula 

 with the female. The parts, therefore, were exserted and their 

 •exact relation easily made out. Basal plate : Long and fairly 

 broad. Anterior end thin and colourless. Dark brown marginal 

 bands along posterior half. Parameres : Rather like a rabbit's 

 ear in outline. The distal end is produced into a very narrow, 

 slender, needle-like apex. The sac is covered with small teeth, 

 especially at the distal end, but I have been able to discover no 

 true penis. At the base of the sac the endomeral chitinisations 

 consist of two parts, a dorsal and a ventral. The dorsal is a 

 stout, lanceolate, median piece, quite separate from the sac, and 

 probabl}^ functioning as a penis. The ventral is a small, thin, 

 rectangular plate, lying between the two lateral bands at the 

 base of the basal plate, and giving support to the sac. From each 



