60 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.63. 



nients with marginal, the third with a row, the fourth with two rows 

 and many shorter bristles on the apical two-thirds; abdominal hairs 

 depressed; first segment black, second and third black at base, the 

 apices gray poUinose, fourth segment shining black except at sides. 

 Legs black, mid tibiae with two bristles on the outside near the 

 middle; hind tibiae sub-ciliate. Wings hyaline, apical cell open, 

 bend of fourth vein with indistinct fold, third vein with four or five 

 bristles at its base. Hypopygium at times quite conspicuous, inner 

 forceps fused together, thickened for about four-fifths their length 

 and then tapering abruptly to a fine hook-like point; on the outer 

 side of the thickened portion of the forceps there is a conspicuous 

 tuft of fine hairs; outer forceps aborted. 



Length 10 to 12 mm. 



Redescribed from the type series of nijje males and females frona 

 Melrose Highlands, Mass., Plummer Island, Maryland, and Tam- 

 pico, Mexico; also from thirteen additional specimens of both sexes, 

 from Pennsylvania, Maryland, Virginia, Florida, South Carolina, 

 and Costa Rica. It will probably be very difficult to separate females 

 of imitator and coccyx from this. 



ry/?e.— Male, Cat. No. 14697, U.S.N.M., from Melrose Highlands. 



PHOROCEKA FLORIDENSIS, Townsend. 



Euphorocera floridensis Townsend, Ent. News, vol. 27, 1916, p. 217. 



Male. — " Differs from E. tachinomoides as follows : Paraf rentals 

 and parafacials deep golden, also orbits; abdomen without any red 

 on sides, the posterior black of the intermediate segments produced 

 forward in a triangle on each side to near front margin, heavA' on 

 second segment, these forming with the median vitta a black trident 

 on each segment. Length, 11.5 mm.; of wing, 8 mm." (Townsend). 

 Front 0.24 to 0.27 of the head width, third antennal joint two and one- 

 half times the second ; thorax with four black vittae not interrupted 

 at the suture; a very distinct tuft of long bristles before the middle 

 coxae, curving backward ; abdomen elongate, without discals, fourth 

 segment red or black at apex, with two rows of bristles, one on the 

 apical half, the other at tip. Hypopygium rather small, the united 

 inner forceps much as in clmnpennis^ but not so suddenly narrowed 

 into the apical process, more gradually tapering; outer forceps 

 forming flat plates as in related species. 



Female. — Front 0.34 of head width. Abdominal pattern as in 

 the male, which readily separates it from claripennis, in which the 

 pattern is in transverse bands. The same character separates it almost 

 ;)S well from tachinomoides^ in which, however, there is a trace of 

 the " tridents " of Townsend's description. 



