uec.,1920 Bulletin of the Brooklyn Entomological Society 125 



23. Antennae with apex of second segment and base of third 



conspicuously reddish ; arista with sparse short hairs ; 

 hind tibia with a posterior bristle in line with upper 

 posterodorsal one emmesia Malloch 



— Antennae with entire second segment and a large portion 



of third reddish ; arista densely pubescent ; hind tibia 

 without a posterior bristle lipsia Walker 



— Antennae entirely black ; arista almost bare ; hind tibia 



without a posterior bristle lativittata Malloch 



24. Mid femur with a strong bristle beyond middle on antero- 



ventral surface ; second antennal segment reddish at 

 apex 25 



— Mid femur with a strong bristle as above ; second anten- 



nal segment entirely black lativittata Malloch 



— • Mid femur without an anteroventral bristle beyond 

 middle ; second antennal segment entirely reddish . 27 



25. Fifth sternite and hypopygium ferruginous; thorax with 



one pair of moderately long presutural acrostichals ; 

 fore tibia with one anterodorsal and two posterior 

 bristles subgrisea Malloch 



— Fifth sternite and hypopygium black ; thorax with two 



pairs of strong presutural acrostichals ; fore tibia with 

 one anterodorsal and one posterior bristle 26 



26. Mid tibia with an anteroventral bristle ; fore femora 



almost entirely black ; fore coxae black. 



quadrlspinosa Malloch 



— Mid tibia without an anteroventral bristle ; fore femora 



with a blackish stripe on upper surface ; fore coxse 

 black in front flavicans Stein 



27. Hind tibia with one anteroventral bristle 



duplicata Malloch 



— Hind tibia with two anteroventral bristles. 



suhstriatella Malloch 



28. Abdomen with an interrupted dorsocentral vitta, and a 



spot on each side of each tergite, giving the abdomen 

 the appearance of having three series of black spots 

 on dorsum acutipennis Malloch 



— Abdomen with or without a blackish dorsocentral vitta, 



without the lateral spots 29 



29. Mid tibia with a median anteroventral bristle ; mid femur 



with one or more strong bristles beyond middle on 

 anteroventral surface apicalis Stein 



— Mid tibia and mid femur without bristles as above ... 30 



30. Tibiae largely or entirely reddish 31 



— Legs entirely black 35 



