INSECUTOR INSCITI^ MENSTRUUS 21 



the front one. Apical crossvein pushed close to margin of 

 wing. Macrochsetae bristlelike. Front at vertex about equal 

 to one eye, slightly widening anteriorly, the face widening 

 therefrom at about same angle. Two proclinate orbitals, one 

 reclinate one ; both verticals developed, proclinate ocellars pres- 

 ent. Para f rentals each a little over half as wide as frontalia. 

 Frontals stopping close to base of antennae. Parafacials nar- 

 rowed below. Cheeks about one-fourth or one-fifth of eye- 

 height. Epistoma cut off, vibrissse nearly level with oral 

 margin. Facialia bare. Second antennal joint short, third 

 hardly over twice length of second. Arista pubescent, thick- 

 ened on basal third, basal joints short. Proboscis short and 

 fleshy, palpi well thickened apically. Abdomen broad, short- 

 ovate; second segment with weak marginal macrochsetse and 

 a median discal, third and fourth segments covered with same 

 moderately thickly and evenly disposed. Legs normal. Wings 

 elongate, rather narrow. Costal spine very small, the costa 

 well bulged basad of same. Apical cell very narrowly open, 

 ending in exact wing-tip. Hind crossvein straight, at right 

 angle to fourth vein, slightly nearer to small crossvein than to 

 cubitus, latter rounded and much approximated to wing- 

 margin; apical crossvein subparallel with margin. 



Anthomyiopsis cypseloides, new species. 



Length of body, 3.5 mm. (abdomen flexed) ; of wing, 4 mm. 

 One female, Franconia, New Hampshire (Mrs. A. T. Slos- 

 son). 



Shining black. Face silvery; frontalia dark brown, with 

 slight bloom; parafrontals thinly silvery. Antennae and palpi 

 light rufous. Thorax and scutellum very thinly dusted with 

 silvery, thoracic vittse obsolete. Abdomen without bloom. 

 Legs black. Wings nearly clear, veins yellowish. Tegulae 

 yellowish-tawny, the front scale more whitish. 



Holotype, No. 19569, U. S. Nat. Mus. 



Psalidopteryx, new genus. 

 Genotype, Psalidopteryx slossoncB Townsend, new species. 

 Female. Head in profile subhemispherical, lower and frontal 



