284 NORTH AMERICAN DIPTERA 



rated by a narrow carina, reaching to the oral margin, the third segment 

 three times as long as wide; arista short plumose; facial grooves absent; 

 two pairs of dorsocentrals ; proplenral and sternopleural bristles absent; 

 scutelkim with two pairs of bristles; posterior femora with bristles 

 beneath; first vein bare above; anal cell rounded apically. Genotype: — 

 Z. hanksi, n. sp, 



Califortalis, new genus 



Related to Ceratoxys Rondani {Ayiacampta Lcew) but readily dis- 

 tinguished by the presence of three or four pairs of marginal scutellars, 

 a single, hair-like frontal and the very hairy front. The single species 

 has somewhat the aspect of certain species of Tetanops Fallen but the 

 bristles of the vertex are long and fine. Genotype: — C. hirsutifrons, 

 n. sp., from California. 



Ortalimyia, new genus 



Related to Ceratoxys Rondani but the front bears only one pair of 

 strong frontals and at most a very weak second pair, the head is longer, 

 the facial carina higher, the face more retreating and the front nar- 

 rower and less hairy. The bristles of the vertex are long and moder- 

 ately strong. Genotype: — Ortalis .mowi Cresson. 



There has been much confusion concerning the identity of the 

 genera mentioned in these notes. Ceratoxys diifcrs from the other genera 

 in the group by its conspicuously haired lunule. This leaves Califor- 

 talis, Tetanops and Ortalimyia and I think the characters in the key 

 will serve to separate them. The front in Tetanops is ahvays wrinkled or 

 pitted and frequently pollinose except for the pits. 



