G. W. KIRKAl.DY, PTIT.OCEKUS ÜCHBACEÜS MONTANDON. 171 



under bark, and Westwood briefly described the nymph (T. 

 E. S. London II. 252). Of Ptilocerus, it is siraply recorded 

 that a specimen of P. afjinis from the Philippines, was found 

 on a Vulture! (Mayr 1866 Novara Exped., Hem. 142). 



Ptilocerus may be recognised by the transverse head, the 

 foliaceously dilated pronotum, and the densely pilose antennae 

 and legs. There are about 14 species, seven of these occurring 

 in the Oriental Region — no fewer than six of these in Java; 

 — one (doubtful) in Japan ; and two (forming according to 

 TMontandon a subgenus only, according to Bergroth a separate 

 genus) from the Aethiopian Region. The six Javanese species 

 are affivù, fuscus, suhannulatus^ venosus, simdanus, and ochraceus. 



The species upon which Mr. Jacobson has made such inter- 

 esting observations i) is P. ochraceus Montandon (1907 Ann. 

 Mus. Hung. V. 419) which is characterised by the densely 

 pilose antennae, the corinm slightly more than one-third 

 longer than the length of the tegmen, the marginal cell being 

 thxee times as long as its width and scarcely wider than the 

 discoidal. On the membrane are three well marked veins down 

 the middle, forming two closed cells, the interior one a little the 

 longer ; apical of the seis a single cell — its base formed by the 

 apical margins of the two long cells just mentioned — which 

 is open apically, the sides curved outwards so that the opening 

 is on the lateral margin of the tegmen just basal of the 

 exterolateral angle. In one specimen, one tegmen is aberrant, 

 this apical cell being divided by a cross vein. The hind tibiae 

 are densely pilose from the base almost to the apex. The general 



(T. E. S. London IT. 249 — 53, PI. 22), erected Ptilocnemus as a subgenus of 

 Holoptilas, placing thereunder lemur, fuscus, and ajßnis. A year previously, he 

 had declared that the second-named was the type of Ptilocerus Gray which 

 he (Westwood) believed to be preoccupied „I would for these species have retai- 

 ned Gi'ay's name Ptilocerus (sic !) but it has long been previously employed in 

 Entomology", (this being, however, a mistake). 

 ' See page 175 — 179 uf this papei-. 



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