EXORISTA.—PHOROCERA. 75 
Hab. Mexico, Amula 6000 feet and Xucumanatlan 7000 feet, in Guerrero, Teapa 
in Tabasco (H. H. Smith); Costa Rica, Cache (Rogers). 
Several specimens of both sexes. 
Two species of the genus Exorista have been characterized by M. Bigot :— 
Exorista rufipalpis, Bigot, Ann. Soc. Ent. Fr. 1888, p. 256. 15.—Mexico. 
—— rufata, Bigot, 1. c. p. 257. 16.—Mexico and Brazil. 
The following species of Eurigaster and Lydella, described by Walker, may belong 
to the genus Frorista in the sense of Schiner. Lydella, Macq., and also the species of 
Eurigaster, at least those having hairy eyes, are united by Schiner to his genus Exorista. 
According to Osten Sacken (Catalogue of the Diptera of N. America, p. 256, note 272 a), 
the genus Eurigaster must be taken as it is adopted by Nowicki (Beitr. zur Kenntniss 
der Dipterenfauna Neu-Seelands, p. 28); but, if so, I cannot find any essential distin- 
guishing character between Eurigaster and Exorista. Therefore I believe I am correct 
in referring the species described by Walker to the genus Exorista; 1 must remark, 
however, that Walker has neglected to mention in his descriptions whether his species 
have the eyes hairy or not. The species are all from Mexico. 
Exorista saginata, Walk. Trans. Ent. Soc. Lond. new ser. v. p. 298 (Hurigaster). 
desita, Walk, 1.c. p. 299 (Eurigaster). 
commetans, Walk. |.c. p. 299 (Hurigaster). 
fertoria, Walk. 1. c. p. 300 (Eurigaster). 
— postica, Walk. l.c. p. 301 (£urigaster). 
habilis, Walk. 1. c. p. 301 (Hurigaster). 
cessatriz, Walk. 1. c. p. 305 (Lydella). 
indita, Walk. 1.c. p. 306 (Lydella *). 
PHOROCERA. 
Phorocera, Robineau-Desvoidy, Essai sur les Myodaires, p. 181 (1830). 
This genus is closely allied to the preceding, but differs from it in having a row of 
bristles ascending at least half the length of the face, this row being absent, or only 
represented by some short bristles above the vibrisse, in Exorista. 
In the Central-American collections before me I find the following species :— 
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