262 CHARLES W. JOHNSON. 



Legs yellow. Wings hyaline, veins yellow, the third longitudinal simple, the 

 discoidal cell emitting two veins. Long. eorp. 4 lin. ; long. al. 3 lin. 



Hub. — Califoruia (Baron). 



The above is Dr. Day's original description. To this Mr. W. A. 

 Snow adds the following : " Head black, near oral margin brownish. 

 AntennjE reddish. Face strongly receding ; pile white. Thorax 

 black, pimctate, pile long, obscure whitish ; scutellum at the apex 

 and the spines yellow ; halteres green, third vein is simple, four pos- 

 terior cells. Length 9 mm. Two males, California (Baron). In 

 the Kan. Univ. collection." 



Six females from Yakima City, Wash., in the Osten Sackeu col- 

 lection at Cambridge, labeled O. (tmericana Day, has the face and 

 front a uniform shining black, and the median black abdominal 

 stripe nearly of a equal with and not dilated as in the female 0. 

 virgo Wied. The latter has not been recorded west of Kansas. 



Dr. Willi.ston says, " 0. americaun Day, is very distinct in the 

 moderately long pile (not ' pubescence') of the metanotum." 



Odoiitoniyia Aldriclii n. sp. (PI. iv, fig. 17). 



I.,ength % 9 9-10 mm. — Face and vertical triangle black ; shining with 

 whitish [)ile on the cheeks and facial crbits. Antennae reddish, tip of the third 

 joint black. Thorax black, with yellowish white pile, which is longest on the 

 plewrsE and pectus; scutellum black, apical margin between the spines and spines 

 yellow. Abdomen entirely green, except a small, black, lunate spot in the middle 

 of the first segment ; in one specimen this is divided into two small arcuate spots ; 

 venter green. Legs yellow. Wings hyaline, veins yellow ; discal cell emits two 

 veins, the third indicated only by a slight angle of the discal cell, third longitu- 

 dinal vein sini])le. 



J. — Face, front and vertex black, shining; pile sparse, whitish and arranged 

 in tufts on the frontal and facial orbits ; occiput black, with a dense, yellowish 

 pubescence; two small yellow spots on each side of the frontal fossa, below the 

 ocelli. Thoi-ax black, with short yellow pubescence, whitish on the pleurae ; scu- 

 tellum black, with black pubescence; inferior apical margin yellow. 



Riley C'ounty, Kansas, June (Marlatt); Sand Hills, Neb., July 

 ^ (Aldrich), with the same habitat and data 9 ; and West Point, 

 Neb., % June (Univ. Neb.). 



Oilonfoiiiyia virgo Wiedemann (PI. iv, figs. 31, 32, 33, 34, 35). 



Odonfomi/ia virqo Wied., Auss. Zw. ii, 69, 13. 



Stratiomi/s virgo Walker. List, etc., v, 39. 



Odontomyia plebeja Loew. Centur. x, 5. 



Odontomyia nigra Day, Proc. Acad. Nat. Sci. Phila. 1882, 75. 



Odontomyia paron Walker, List, etc.. iii, 536. 

 Length % 9 7 10 mm. ; wing 6-8 mm. %. — Face black, shining, with whitish 

 pile; ocellar triangular black, ocelli brownish. Antennte reddish, terminal joint 

 dark brown. Thorax black, covered with yellowish pubescence, longest on the 



