204 ENTOMOLOGICAL NEWS [xxxii, '21 



bristle weak, directed ventrad ; abdomen without paired dorsal spots ; 

 interfrontalia reddish anteriorly dcnticornis Malloch 



- Third antennal segment more or less angulated at apex but not pro- 



duced thornlike 20 



20. Lower stigmatal bristle very weak, sometimes absent, when present 

 directed upward ; fore coxae and femora entirely or almost entirely 

 black 21 



- Lower stigmatal bristle directed outward and ventrad, or the legs 



not colored as above 22 



21. Male hypopygium very prominent, fifth dorsal segment very large, 

 globose; fifth sternite with very large, exposed processes, which 

 are arcuately emarginate on lower margins and rounded above, pre- 

 senting a slightly crescentric shape ; mid and hind femora in both 

 sexes usually yellow; basal segment of hind tarsi not one-third 

 as long as their tibiae hypopyyialis Stein 



- Hypopygium moderately prominent; fifth dorsal segment subequal in 



length to basal segment of hypopygium; fifth sternite with large 

 processes which are almost straight on their inner or lower mar- 

 gins ; mid and hind femora usually yellow ; basal segment of hind 

 tarsus a little over one-third as long as hind tibia, 



errans n. n. (stcinii Johnson nee Verrall) 



- Hypopygium very small, hardly protruded, fifth sternite with very 



short processes ; mid and hind femora conspicuously blackened at 

 apices; basal segment of mid and hind tarsi at least one-third as 

 long as their tibiae I at a Walker 



22. Fore coxae largely or entirely, mid and hind femora entirely yel- 

 low 23 



- Fore coxae and all femora largely or entirely black 25 



- Fore coxae yellow, all femora with a black or brownish mark above 



near apices; abdomen unspotted: antennae and palpi black; thorax 

 and abdomen with pale gray pruinescence impunctata Malloch 



23. 'Male with a bare glossy black area on each side of abdomen at apex 



of first segment ; abdomen in both sexes with an interrupted central 

 vitta and paired spots on dorsum black ovata Stein 



- Male without a hare glossy area on each side of abdomen; abdomen 



in both sexes with only paired dorsal spots 24 



24. Antennae short, extending but little below middle of face, upper 

 apical angle of third segment blunt: abdomen in both sexes with 

 very distinct paired dorsal spots flm'ico.ra Stein 



- Antennae elongate, extending over four-fifths of the distance to 



mouth-margin, upper apical angle of third segment very acute; 

 abdomen in both sexes with very indistinct paired dorsal spots, 



pallipcs Stein 



25. Hind tibia with two or three median anterodorsal bristles, 



itlicna Malloch 



- Hind tibia with only one anterodorsal bristle 26 



