258 Lloyd's natural history. 



middle segments is a pointed red elevation, the first of which 

 is forked. 



The last segment, which is held erect, consists of a quadri 

 lateral, somewhat convex plate, and has in the middle a 

 brownish-yellow spot margined with deep yellow. 



Larva of Hoplitis milhattseri. 



The anal claspers are replaced by two short spines. On each 

 side of the middle segments is an oblique elongated flesh- 

 coloured spot. 



If feeds on oak, elm, birch, poplar, &c. 



The cocoon is placed in the crevices of the bark, and re- 

 sembles it so much, being made with fragments of lichen, that 

 it is almost impossible to find it before the Moth has emerged. 

 The pupa is dark brown, with the back and wing-cases black. 



GENUS PTEROSTO^IA. 



Pterostoma, Germar, Syst. Gloss. Prodr. ii. p. 42 (181 2); 



Walker, List Lepid. Ins. Brit. Mus. v. p. 1005 (1855). 

 Ptilodontis, Stephens, 111. Brit. Ent. Haust. ii. p. 28 (1828). 

 Orthorifiia, Boisduval, Ind. Meth. p. 56 (1829). 



This is one of .the most distinct genera in the whole family ; 

 the antennae are very broadly pectinated to the tip in the male, 

 less broadly in the female ; the palpi are very long, projecting, 

 and obliquely curved upwards ; the body is moderately stout, 

 very long, and tufted at the extremity, the tuft bifid in the 



