1875.1 203 



PoLTETES. — Thia genus was eeparatcd by E. Desvoidy from tho 

 AntJiomjjiidcB and placed among tlio Muscides, from the resemblance 

 which the two species contained in it bear to some of the more highly 

 developed flics ; but it possesses the essential character of the family 

 in a very high degree, the fourth and fifth longitudinal veins diverging 

 considerably from each other at their extremities, thus leaving the first 

 posterior cells of the wings widely open. Of the two species which it 

 contains, one is the well known Musca Jardaria, Fab., in size and form 

 much like the common blue-bottle fly, but lighter and greyer in colour ; 

 and the other the Musca alho-llneatn, Fall., the Macrosoma jloralis of 

 DcHvoidy, which closely resembles Cyrloneura hortorum in colour and 

 markings. 



IItetodesia. — This includes all the species (except the two in the 

 previous genus) which have plumose antennae and hairy eyes. It cor- 

 responds to the first half of the genus Aricin of Macquart and others. 

 The typical species arc mostly of considerable size, have an oval abdo- 

 men, and form a very natural group ; but a good many aberrant species 

 of email size and oblong form are obliged to bo associated with them. 



CTo be continued). 



DESCRIPTION OF a NEW SPECIES of BRASS0LIN2E fhom BOGOTA. 

 BY W. L. niSTAXT. 



Opsiphanes Boootanus, n. sp. 



Wings nliovo, chocolate-brown, front wings with first lialf of costal area of a 

 more rufous-brown, from which, near the base, a semi-circular patch of the same 

 colour extends over about one-third of discoidal cell to base of internal area, a some- 

 what irregular band of yelluwlsh-whito extending from costal margin immediately 

 past extremity of cell to external angle, widening below cell and terminating in a 

 smallish sub-marginal patch ; three sub-apical white spots. Hind-wings with 

 abdominal half of a more rufous-brown, which occupies lower half of cell and 

 extends through second median interspace to abdominal area which is yellowish- 

 wliite, two sub-marginal, somewhat obscure, narrow waved bands of darker brown. 



Wings below very similar to 0. CrawierJ, Fclder, and to 0. Ort/clorix, llcwitson. 



Expanse of wings, 4 in. 2 lin. Ilab. : Bogota. 



A female, apparently of this species, is in tho National Collection 

 from Venezuela, and in colour and nini-kings somewhat closely re- 

 sembles 0. Cramcri, Felder. 



Strcatham Cottage, Bupcleuch Road, 

 West Dulwich, S.E. : 



Januari) 2nd, 1875. 



