53 INSECUTOR INSCITI^B MENSTRUUS 



numbering only about eight. Hind tibiae not ciliate, at most 

 weakly subpectinate. Wings narrower, not broadened basally. 

 Palpi often greatly enlarged apically. 



Male. — Differs as follows from female : Vertex hardly over 

 one-seventh head-width ; antennae shorter, third joint hardly 

 over one and one-half times second. Hind tibiae evenly pecti- 

 nate, without longer bristle. Wings slightly widened at base. 

 Palpi very slender, faintly thickened apically. 



Eutheresia monohammi Townsend. 



Length of body, 11 mm. ; of wing, 9 mm. One female, 

 Georgia, labeled "Theresia analis Desv." in Coquillett's hand. 



Rufotestaceous to brownish, silvery pollinose. Palpi, anten- 

 nse and femora rufous ; f rontalia brownish ; face, cheeks, para- 

 frontals and occiput silvery. Thorax, scutellum and abdomen 

 ashy-silvery ; five thoracic vittae, the median one and outer 

 pair equal, the inner pair linear and approximated to the 

 median one. Pollen of abdomen thin, more distinct on bases 

 of segments. Tibiae brownish-rufous, tarsi brownish. Wings 

 faintly tinged with smoky-yellowish along veins. Tegulae 

 white. 



Holotype, No. 19475, U. S. Nat. Mus., TD1788. Not 

 Zdia analis R. D., 1830, Myod. 315-316. 



Eutheresia canescens Walker. 



Dc.via canescens Walker, 1856, Ins. Saund. Dipt. 310. 



Length of body, 10 to 11 mm. ; of wing, 8 to 9 mm. Ten 

 females and six males, as follows: Eight females and four 

 males reared from Monohammus confusor, being specimens 

 previously referred to B. monohammi (1. c), together with 

 male labeled as parasitic on a cerambycid in chestnut; one 

 male and one female, Springfield, Massachusetts, Dimmock's 

 Ent. Notes, 1820-a and 1840-x; and one female, Pittsburgh, 

 Pennsylvania (G. A. Ehrman). 



Differs from E. monohammi chiefly in being deeply black or 

 blackish, with legs wholly black or dark brown. The front 

 and cheeks are broader than in the genotype, and the para- 

 facials are proportionately rather wider. The male generic 



