NORTH AMERICAN DIPTERA. 259 



hyaline, veins brown ; discal cell emits two veins, third longitudinal vein 

 branched. 



9 . — Face, front and vertex black, dense yellowish tomentnm on the face and 

 occiput; vertical angle, a longitudinal line on each side of the frontal fovesB, oral 

 margin and the lower part of the occiput yellowish ; in one specimen the mark- 

 ings on the vertex and front are wanting ; dorsum of the thorax and the scutellum 

 with a dense yellowish tomentum, pilose on the i>lcurse and pectus ; abdominal 

 marking less prominent than in the male, and not subtriangular. 



Los Angeles County and Santa Clara County, California, April 

 (Coquillett) ; Kei'n County, Califoj'nia (Univ. Kans.). 



Odoiitoniyia lexiiNiaiia n. sp. 



Length 'J, J 9 mm. % . — Face bhick, with light yellow j)ile. Antennaj red ; 

 first and tip of the third joints black, proboscis black. Thorax black, with yellow 

 pile, posterior angle yellowish : scutellum black, narrowly margined with dark 

 yellow, spines yellow. Thorax black, with pnmiinent, yellow, triangular mark- 

 ings at the posterior angles of the second, third and fourth segments ; fifth with 

 a narrow lateral and posterior margin ; venter green. Femora black ; tip of the 

 femora, the tibite and tarsi red ; tip of the tibije (sometimes) and the terminal 

 joint of the tarsi brownish. Wings hyaline, veins yellow; third longitudinal 

 vein simple, discal cell emits three veins. 



9 • — Facial orbits, front, vertical angle and occiput green ; vertex, two oblique 

 angular spots on the front, which are narrowly connected with the black above 

 the base of the antennge and the face, black. Antennae red ; first and tip of the 

 third joints black. Thorax black, with yellowish pubescence; a continuous lat- 

 eral line, or only the humeri, an elongated spot before the suture and the poste- 

 rior angles green ; pleurae green, sternum black ; scutellum black, with wide 

 lateral margins of green ; spines yellow. Abdomen black; second, third and 

 fourth segments with lateral, subtriangular markings that are greatly attenuated 

 along the posterior margins; on third and fourth these are sometimes united, 

 forming a wide posterior margin ; fifth with a wide lateral and posterior margin. 



Texas (Amer. Ent. Soc.) ; Waco, Texas (Belfrage), coll. C. V. 

 Riley, U. S. Nat. Mus. 



Odontomyia trivittata Say (PI. iv, fig. 19). 



Stratiomys trivitiata Say, Jour. Ac. Nat. Sci. Phila. vi, 160 ; Compl. Wr. ii, 356. 

 Odontomyia tritteniafa Bellardi. Saggio, etc., i, 38, tab. i, fig. 17. 

 Odontomyia tritxniata Osten Sacken, Bit)!. Cent. -Amer. Dipt. 36. 



Length 'J, 9 ^"^ ™™- ? ■ — Face, front, vertex and occiput greenish yellow ; a 

 small black dot on each side of the facial prominence ; a transverse, wavy line 

 acro.ss the front that projects downward above the antennae ; a sjjot on the orbits 

 opposite the base of the antennae, and a spot on each side of the ocelli brownish 

 (the frontal markings vary considerably, and are sometimes obsolete) : ocellar area 

 and proboscis black. Antenuse yellowish, tips brownish. Thorax brownish 

 black, narrowly divided by green lines into three broad vittse, these are widest 

 anteriorly, and gradually attenuated posteriorly; lateral stripe, pleurae and scu- 

 tellum green, spines yellow ; metanotum and pectus brownish black. Abdomen 

 greenish, with a more or less prominent, black, interrupted, dorsal line, the black 

 markings surrounded by a brownish stain ; venter green. Legs j'ellow, terminal 



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



