INSECUTOR INSCITI^ MENSTRUUS 31 



ones of the semicolon type, the inner ones subHnear and reach- 

 ing well behind suture, a fifth vitta showing in middle behind 

 suture. First abdominal segment black, the broad hind borders 

 of second to fourth shining black and without pollen. The 

 silvery of bases of last three segments is narrower in the 

 male. Legs black, femora pollinose, tibiae with a rufous-brown 

 tinge. Wings clear. Tegulae nearly white. The anal segment 

 of female may be slightly or broadly tipped with rufous. 



Masicera chcrtoneura Coquillett, 1897, Rev. Tach. 115, from 

 the White Mountains, New Hampshire, belongs to this genus. 



Hylotomomyia, new genus. 



Genotype, Admontia hylotom<B Coquillett, 1898, Can. Ent. 

 XXX, 233. 



Dififers from allied genera with piercer as follows : Lateral 

 edges of tergal sclerite of third segment in female meeting on 

 median ventral line and set with row of closely-placed very 

 short spines, forming a weak ventral carina when venter is not 

 collapsed ; a short piercer present in female. Paraf acials with 

 an area of fine hairs on lower portion. Facialia ciliate one- 

 fourth to one-third way up. Vibrissge inserted above oral 

 margin. Head subtriangular in profile, the lower border very 

 short and rather rounded. Parafacial profile faintly convex. 

 Antennae shortened, not reaching vibrissae in either sex ; second 

 joint elongate. Cheek grooves ascending broadly behind eyes. 

 Strong discal bristles in male, weak ones in female. Abdomen 

 rather thickly clothed with bristly hairs, especially in male. 

 Costal spine present. Cubitus broadly rounded, the hind cross- 

 vein a little nearer to same than to small crossvein. Apical 

 cell open to almost closed, ending a little before wing-tip. 

 Allied to Spathimeigenia, from which it may be at once known 

 by the lack of short spines on ventral edges of anal segment. 



The holotype is a male. Woods Hole, Massachusetts. 



Euzenillia Townsend. 



Ann. Ent. Soc. Amer., IV, 148 (June, 1911). 



Journ. N. Y. Ent. Soc, XX, 111-112 (June, 1912). 

 Genotype, Hypostena variabilis Coquillett, 1895, Journ. N. 

 Y. Ent. Soc, HI, 57 (Syn. Euzenillia aurea Townsend, 1911- 



