82 INSECUTOR INSCITI^ MENSTRUUS 



profiles curved. Front view shows head to be much broader 

 than high. Front almost equilateral, wider at vertex than one 

 eye. Antennal and vibrissal axes about equal. Facial plate 

 short, broad below, subtriangular, epistoma cut off, the 

 vibrissse about level with oral margin. Facialia bare. Probos- 

 cis short, fleshy; palpi subfiliform, slightly thickened at tip. 

 Antennae inserted well above eye-middle, second joint short, 

 third joint only slightly longer than second. Arista thickened 

 on basal third, basal joints very short. Eyes bare, descending 

 a little short of the vibrissal level. Frontals few, descending 

 but little below base of antennae ; both verticals developed ; two 

 proclinate f ronto-orbitals, and one reclinate ; proclinate pair of 

 ocellars. Frontalia narrowing posteriorly, at widest much nar- 

 rower than parafrontals. Parafacials much narrowed below, 

 bare. Cheeks about two-fifths eye-height. Stemopleurals, 

 1 :0 :1, some very weak hairlike bristles between them ; post- 

 suturals, 3; preacrostichals, 3 weak; postacrostichals, 4, but 

 all except the hind one are weak. Three lateral scutellars, an 

 equally long decussate apical pair, and a weak approximated 

 discal pair. Abdomen almost perfectly ovate in outline from 

 above, very bristly ; first segment with only a very weak median 

 marginal pair of bristles and some stronger mraginal ones lat- 

 erally; second with a long median discal, some lateral discals, 

 and a marginal row of which the median pair is strongest; 

 third and fourth segments with complete discal and marginal 

 rows, the fourth segment being very convex and with extra 

 bristles between the discal and marginal rows. All the macro- 

 chaetae are erect or suberect. Costal spine small. Venation 

 like Psalida, petiole of apical cell about as long as hind cross- 

 vein, latter about in middle between cubitus and small cross- 

 vein, cubitus almost but not quite evenly rounded. No veins 

 bristled, except third at base. Tegulae normal. Claws short. 



Psalidopteryx slossonae, new species. 



Length of body, 3.75 mm.; of wing, nearly 3.5 mm. One 

 female, Mount Washington, New Hampshire (Mrs. A. T. 

 Slosson). 



