AMERICAN DIFTERA. 331 



last abdominal segment almost completely white-pollinose ; the preoeding seg- 

 ments marked on each side with a white-pollinose spot, very large in the female, 

 but smaller and not reaching the posterior margins of the segments in the male. 

 Hypopygium small ; the upper appendages changed from lamellse to small, swol- 

 len, ovate, dusky yellow, very short and very finely pubescent bodies: filament 

 concealed. Coxse dusky gray, yellowish towards apex; femora black, apically 

 badious, sometimes wholly badious, below marked with a large black spot; tibise 

 testaceous, base often broadly badious; tarsi testaceous, last joint black. Hal- 

 teres whitish. Wings very pale cinerascent, veins fuscous. 5 mm. 



District of Columbia (Osten Sacken). 



Pachynieria brevis Loew. 

 Cent, ii, 22. 



Head black, cinereous with pale pollen, occiput black-pilose. Antennae black. 

 Dorsum of thorax cinereous with pale pollen, very faintly sub-vittate, provided 

 with rigid hairs and black macrochjetse. Scutellum concolorous w'ith the thorax, 

 with four marginal black bristles. Pleurae black, cinereo-pollinose, and black- 

 pilose. Abdomen rather broad, sub-depressed, black, and black-pilose. Hypo- 

 pygium small, compressed, black, the lower lamellae ovate, the central filament 

 pale yellow, low, arcuate. Coxae black, cinereo-pollinose, black-pilose. Wings 

 cinerascent, veins fuscous. 4.2 mm. 



District of Columbia (Osten Sacken). 



ITEAPHIL.A Zetterstedt. 

 Small, blackish, rather thickly pubescent, Evipis-Yike species. 

 Antennae longer than the head, plainly three-jointed, basal joints 

 short, with erect hairs, last joint oval, bare, with a very short arista. 

 Proboscis as long (female) or longer than the head, rather thick, 

 horizontal, palpi lengthened. Eyes of male contiguous, of the 

 female widely separated. The male abdomen small, with projecting 

 anal appendages. Legs slender, simple. Wings with the third vein 

 forked, the upper Taranch reaching straight to the costa; discal cell 

 present, with three apical veins; anal cell shorter than the second 

 basal, both bounded by a cross-vein almost parallel with tlie hind 

 margin ; anal angle strong. 



Iteapliila IVIarqnarti Zeterstedt. 

 Ins. Lappouica, 541, i. 



Black, or piceous. Thoracic dorsum indistinctly vittate. Halteres black. Legs 

 blactk with reddish knees. Wings brownish (male) or hyaline (female) with the 

 veins plainly bordered with brown. 4 mm. 



New Hampshire, Quebec. 



Iteapliila perigrina sp. nov. (Fig. 97). 

 Length 3 mm. — Black, abdomen more or less piceous, feebly dusted and there- 

 fore sub-shining, provided with sparse, slender hairs; eyes of the male broadly 



TEANS. AM. ENT. SOC, XXVIII. SEPTEMBER, 190!:^. 



