358 



13- Probezzia incerta, n. sp. 



Female. — Black, slightly shining. Antennae fuscous, basal half of 

 flagellum yellowish. Mesonotum with slight whitish pruinescence, 

 which is most distinct near lateral anterior angles; pleurae with slight 

 grayish pruinescence. Abdomen shining black, the surface with very 

 slight grayish pruinescence. Legs yellow, coxse, apices of hind femora, 

 hind tibiae except their bases, and whole of hind tarsi dark brown. 

 Wings clear, veins yellow. Halteres brownish yellow. 



Eyes separated by less than one sixth the width of head ; antennae 

 one and a half times as long as head and thorax together, second joint 

 of flagellum about four times as long as its diameter. Mesonotum with 

 very short, closely placed, black setulose hairs ; 2-3 rather weak setulae 

 in front of wing-base. Abdomen broadest at second segment. Legs 

 similar to those of fidvithorax, but the hind tarsi are thicker and the 

 claws comparatively much smaller, and simple. Third vein to four 

 fifths the wing-length; first, to two fifths the length of third; media 

 forking at cross vein ; cubitus forking distinctly beyond it. 



Length, 2.5 mm. 



Type locality, Monticello, 111., June 21-30 (J. R. Malloch). Taken 

 by sweeping vegetation along the bank of the Sangamon River. 



14. Probezzia flavonigra Coquillett 



Ceratopogon flavoniger Coquillett, Jour. N. Y. Ent. Soc, Vol. 13, 1905, p. 60. 

 Probezzia flavonigra (Coquillett) Malloch, Proc. Biol. Soc. Wash., Vol. 27, p. 138. 



This species, if distinct, must be very close to the male of elegans. 

 Coquillett described the species from a male taken at Bear Lake, B. C, 

 and no subsequent captures are recorded. The only distinctions be- 

 tween the descriptions of flavonigra and elegans are given in the fore- 

 going key to the species. 



Parabezzia, n. gen. 



The species of this genus are separable from those of Probezzia by 

 the petiolate media. In Probezzia the media forks either at or before 

 the cross vein. 



Type of genus, Parabezzia petiolata, n. sp. 



Key to Species 



1. Glossy black species; third vein less than to two thirds the wing- 

 length 1. petiolata. 



— Opaque black species with yellow scutellum, or entirely yellow 

 species; third vein more than to two thirds the wing-length 2 



