110 Mr. E. Doubleday's Description 



coxae, brownish testaceous. Head beneath violet, strongly punc- 

 tured, yellow at the base ; the antenniferous tubercles yellowish. 

 Rostrum very long, reaching nearly to the apex of the abdomen, 

 brassy green, shining ; the edges of the basal joint yellow. An- 

 tennae (mutilated) violet-black. 



The only specimen of this insect in the British Museum is evi- 

 dently deficient in spots ; the two spots in the anterior angles of 

 the prothorax being the remains of a transverse band on that part; 

 the spots on the disc of the thorax, and most probably six spots 

 of the scutellum, being wanting. It is very nearly allied to P. 

 dives, but appears to be distinct ; it may possibly, however, turn 

 out to be the female of that species. 



XXVIII. Description of some Species o/ Geometridae /rom 

 South America, forming a new Genus, By Edward 

 DouBLEDAY, Esq. F.L.S., F.Z.S., &c. 



[Read May 1st, 1848.] 



The beautiful insects forming the genus I am about to characterize 

 are natives of the mountainous regions of the tropical portions of 

 South America. The only specimens I have seen of the species 

 here described were brought home by Mr. Dyson from Venezuela, 

 and by Mr. Bridges from Bolivia. The former traveller found 

 the three first species in the lofty mountains of Caraccas, the latter 

 collected the fourth and fifth species in the country of the Yuru- 

 cam Indians, in the Andes of Bolivia. I have also seen one spe- 

 cies from the mountainous parts of Brazil, and much regret not 

 being able to lay before the Society a description of it. It belongs 

 to the third section. Of the affinities of the genus I can say 

 nothing. We know too little of the Geometridcs to venture upon 

 that subject, yet perhaps I might safely suggest an alliance to the 

 genera Odezia, Torula and Psodos, all more or less mountain genera. 

 The analogy in form to some of the Erycinidce cannot be over- 

 looked. 



Like the genera Odez'ia, Torula and Psodos, the Erateince are 

 diurnal insects. 



The first segment of the abdomen offers the same remarkable 

 cavity which, on a former occasion, I mentioned to this Society as 

 occurring in some of the Glaucopidce, considering it to be analogous 



