\'ol. XXvi] ENTOMOLOGICAL NEWS. 301 



hold. The presence or absence of yellow margins on the ab- 

 dominal segments is apparently of little specific value and so 

 is not used to the extent that it has been. There is often con- 

 siderable variation in the length of the proboscis of speci m ens 

 of the same species, also in the coloration of the halteres, so 

 these characters should be used with care. In associating the 

 two sexes the possible diflferences in coloration must be con- 

 sidered. 



The material examined from Texas and New Mexico was 

 collected by Messrs. J. A. G. Rehn and H. L. Viereck in the 

 bte Spring of 1902. All types of the new species, except where 

 otherwise noted, are in the collection here. The length given 

 for the specimens al%vays excludes the proboscis and antennae. 



P8EUDOQERON gen. nor. 



Small species, moderately pilose to nearly bare. Head hemi- 

 spherical, at nxMt broad as thorax. Eyes Urge, broadly ooo* 

 tiguous in the male. Frons in female about one-third width 

 of head in known species. Vertical triangle occupied entirely 

 by the prominent ocdlar tubercle. Face medianly, contained 

 in the large oral cavity; the sides more or less broad: lower 

 occiput convex. Antennae situated about on median line of 

 eyes; first joint generally shorter than third; second globose; 

 third much longer than broad, apex rounded and notched at 

 or near upper angle in whidi is situated the short or minute 

 style. Proboscis exserted, corneous, as long as, or longer than, 

 the head ; palpi slender. 



Thorax higher than long; strongly convex doraaOy, more or 

 less hunch-backed. 5>cutellum convex, rounded apically. Ab- 

 domen conical, broad as thorax, rarely longer. Ijegs slender 

 without spurs ; pulvilli normal ; empodium rudimentary. Wings 

 hyaline in known species, with auxiliary first and second veins 

 long, the latter ending in the costa ; third branched beyond dis- 

 cal cell, the two members of the branch subequal in length, 

 generally acutely diverging at their bases ; second submarginal 

 cell about two to four times as long as broad ; three posterior 

 cells present ; anal cell closed. 



Type species — Pseudogeron mitts $p. nov. 



