148 ENTOMOLOGICAL SOCIETY 



Mutiloptera apicalis, n. sp. 



Yellow, the abdomen black, halteres white. Wings hyaline, the apex 

 brown, which color extends half way to the hind cross-vein, the latter 

 not longer than the small cross-vein and clouded with brown. Length 

 slightly over 2 mm. 



Tower City, N. Dak. Two females collected June 19, 1906, 

 by Mr. G. I. Reeves. 



Type. — No. 11512, U. S. National Museum. 



Pseudiastata, n. gen., Geomyzidae. 



Near Diastata, but the second basal cell is coalescent with the discal, 

 the three pairs of fronto-orbital bristles are arranged in a single row 

 on either side of the front, etc. Third joint of the antennae subellip- 

 tical, the arista basal and almost bare. Two pairs of vertical bristles, 

 the postvertical and ocellar bristles present. Face concave, vibrissas 

 well-developed, cheeks less than one-eighth as wide as the eye-height. 

 Proboscis short, robust, labella terminal, palpi clavate, well-developed. 

 Thorax bears one pair of acrostichal bristles, two dorsocentrals, 

 three supra-alars, two notopleurals, one humeral, and two sternopleural, 

 scutellum with two pairs of nearly an equal size. Front and hind 

 tibiae with a short but stout preapical bristle, the middle tibiae with 

 a transverse pair. Wings broad, anal angle well-developed, auxiliary 

 vein terminating in the first near its base, apex of first vein opposite 

 the small cross-vein, anal cell present. 



Type. — The following species : 



Pseudiastata nebulosa, n. sp. 



Yellow, the abdomen brown. Front sparsely covered with short hairs. 

 Mesonotum densely covered with short hairs, not arranged in rows. 

 Wings hyaline, marked with six brown bands ; of these the first ex- 

 tends from the apex of the first vein over the small cross-vein and 

 stops at the middle of the discal cell ; the second extends from the 

 costa to the discal cell a short distance before its apex ; the third 

 extends from the costa to the third vein; the fourth covers the hind 

 cross-vein; the fifth extends from the costa to the middle of the first 

 posterior cell and at its costal end is connected with the sixth, which 

 extends from the costa to the third vein a short distance before its 

 tip. Length slightly over 3 mm. 



Plummers Island, Maryland. A single specimen collected 

 August I, 1902, by Mr. H. S. Barber. 



Type. — No. 11513, U. S. National Museum. 



