DIPTEEA. 311 



but their identification presents unusual difficulties. I have recognized two or three 

 of them only. 



The rights of priority of the name Deromyia over Diogmites I have discussed 

 elsewhere. Notwithstanding Osten Sacken's objections, I still insist that it must 

 take precedence. Deromyia was described earlier than Diogmites, of that I think 

 there is no question; its type clearly pertains to the same genus, and the original 

 description by Philippi was better than that of Diogmites by Loew. Deromyia 

 gracilis, Rond., has a closed fourth posterior cell, and it cannot possibly be separated 

 from the species of Diogmites : this must be considered the type of the genus. Osten 

 Sacken says : " Should even the generic identity be proved, Deromyia may remain 

 as a subgenus " of Diogmites, which was described later, less completely, and 

 without figure ! 



1. Deromyia sallsei. 



Diogmites sallai (Bellardi), O. Sack. atitea, p. 174, t. 3. fig. 8 \ 



To the localities given, add : — Mexico, Tierra Colorada, Chilpancingo, Rio Papagaio, 

 Venta de Zopilote, Dos Arroyos and Tepetlapa in Guerrero, Atoyac in Vera Cruz, 

 Teapa in Tabasco (//. H. Smith), Santiago Iscuintla, San Bias, and Guadalajara in 

 Jalisco, Navarrete, Tepic (Schumann), N. Yucatan (Gaumer). 



Thirty-five specimens, differing considerably in size. 



7. Deromyia jalapensis. 



? Diogmites jalapensis (Bellardi), O. Sack, antea, p. 177. 



To the locality given, add :— Mexico, Atoyac in Vera Cruz (//. //. Smith), San 

 Lorenzo, Cuesta de Misantla (M. Trujillo), N. Yucatan (Gaumer). 



Seven specimens, one of which is from Jalapa, whence the type was obtained. 



7 (a). Deromyia ? 



? Diogmites jalapensis (Bellardi), O. Sack, antea, p. 177. 



Hah. Mexico, Amula and Omilteme in Guerrero 6000 to 8000 feet (H. H. Smith). 



Thirty-five specimens. They may belong to D. jalapensis, as identified by Osten 

 Sacken, but they are all larger, the palpi and the anterior end of the median velvety 

 stripe of the mesonotum are black, and the hind femora are without black. Otherwise 

 they agree well with D. rubescens, the size being the same. 



9. Deromyia 



A Q A well-marked species, which I am not able to certainly identify with any previously described. The 

 abdomen is deep browD, with broad conspicuous posterior bands. The markings of the mesonotum are 



