NORTH AMERICAN DIPTERA. 269 



gins, slightly widening at the. posterior angles ; posterior margin of the fifth sub- 

 triangular, there is also an obsolete spot near the posterior angle of the first seg- 

 ment: tarsi lighter than in the male. 



Pennsylvania; Virginia (Amer. Ent. Soc). 



The above description is based on one female (Pennsylvania) and 

 two males (Virginia) in the collection of the American Entomological 

 Society. In antennal characters it closely resembles O. Jiavicornis 

 Oliv., but the eyes of the male are glabrous. The species is readily 

 distinguished by its dull black color and absence of prominent lateral 

 transverse markings. 



Odoiitoinyia flavicoriiis 01i%'ier (PI. iv, figs. 21, 22). 



Odontonu/ia flxivicornis Oliv., Ency. Meth. viii, 433, 9; Macquart, Hist. Nat. 

 Dipt, i, 243. 4 ; Day, Proc. Acad. Nat. Sci. 1882, 87. 



t^fnifiomys jlaviceps Macquart, Hist. Nat. i, 245. 



Stnitiomys coronata Guerin, Iconogr. Texte, 544, tab. 98, fig. 5. 



Stratiomys pulchella Macquart, Dipt. Exot. 1, 1. 180, 3 ; tab. xxii, fig. 2. 



Stratiomys vichia Macquart, Dipt. Exot. i, 1. 181, 4 (" % of S'. flaviceps f) 

 (non Odontomyia vicina Macq., Dipt. Exot. i, 188, 11, Cuba). 



(klontomyia lasiophthalma Loew, Centur. vi, 23, % . 

 Length % 9 mm ; wing 7 mm. — Face black, whitish pubescence, a spot on the 

 facial orbits and on each side of the oral margin yellow; eyes conspicuously 

 pilose : first and second joints of the antennse yellow, third brownish black ; the 

 first joint more than double the length of the second. Thorax black, with yel- 

 lowish pile; ])osterior angle, a large angular and small ovate spot on the pleurte, 

 yellow ;.scutellum black, narrow margin and spines yellow, sjiines small, haltercs 

 green. Abdomen black, jvith greenish yellow markings ; second segment with 

 large lateral triangles ; third with a subtriangular marking at the posterior angles, 

 not reaching the anterior margin ; fourth with transverse markings at the lateral 

 posterior margin ; fifth with lateral and posterior margin ; venter greenish yel- 

 low. Femora black ; tips of the femora, tibiae and tarsi yellow, posterior tibite 

 with a middle and apical band, and the tips of the tarsal joints red. Wings 

 hyaline, veins light yellow, discal cell emits three veins, third longitudinal vein 

 simple. 



9 . — Face, front and occiput yellow; vertex, a large quadrate spot surrounding 

 the antennae, an M-shaped marking on the front, facial groove and a spot on the 

 ei)istoma margin black. Thorax black, with yellow pubescence : humeri, lateral 

 stripe, scutellum and pleurae, yellow; pectus black. Abdomen black, lateral 

 margin of the first, a large triangle in the posterior angles of the second and 

 third, an elongated spot at the posterior angle of the fourth occupying about 

 two-fifths of the posterior margin ; posterior margin of the fifth, and a narrow 

 lateral margin on all the segments, yellow ; venter yellow. 



Delav/are County, Pennsylvania, July 7. Two specimens, Illinois 

 (Amer. Ent. Soc); New York (Loew); Caldwell, N. J. (Crane); 

 North Carolina ( Riley j. 



TRANS. AM. ENT. SOC. XXII. JULY. 1895. 



