264 charlp:s w. .tohnson. 



Bi'ookings, 8. D. (Aldrich); Champaign Coiintv, Illinois (W. A. 

 Snow); Algon(|Uui, 111. (Dr. Ntison) ; West I'oint, Neb., July 

 (Univ. Neb.). 



Odontoinyia luicrostoiiia Locw (PI. iv, flg. 20). 

 Odontomyin microstoma Loew, Centiir. vi, 28. 



Length 9 12 niru. — Face, front and vertex yellow, sparsely covered veith yel- 

 low pile below the auteuniE. shining above ; first two joints of the antennse 

 brown, base of the first and outer end of the second darker, terminal joint black, 

 gradually tapering to a point; about half way between the antennie and ocelli 

 is a short, transverse line or spot; ocellar triangle black, and on each side a 

 brownish spot ; occiput yellow. Thorax black, densely clothed with short, yel- 

 h)W toinentuni; humerus and posterior angle yellow; scutellum yellow, spines 

 tipped with black, pectus black. Abdomen with a broad, brownish black dorsal 

 stripe, with lateral margins of yellow, the dorsal stripes varies greatly in color 

 from a uniform black with a yellowish triangle on the posterior margin of the 

 fourth segment to a brownish yellow, with the posterior margms of the segments 

 darker and sometimes a yellow interrupted dorsal line; venter yellow, with a 

 dark brown marginal stri])e. Legs yellow, two or three of the terminal joints 

 of the jjosterior tarsi brown. Wings hyaline, veins yellow, third longitudinal 

 vein simple, discoidal cell emits two veins. 



Length % 10 ram. — Face and vertical triangle black, the former with yellow 

 ])ile. Antennse black. Thorax uniform blactk, pile yellow ; scutellum black, with 

 a broad posterior margin of yellow. Abdominal markings uniform black, the 

 yellow triangle on the fourth segment very small or wanting. Femora, except 

 the tip, brownish black, a brown band on the middle of the tibi«, and the poste- 

 rior tarsi brownish. 



Common at Anglesea, N. J., July 19 ; Cape May, June 22 ; Mary- 

 land (Aldrich); New York (Williston) ; Chelsea, Mass., July 31 

 (Henshaw). 



I have only collected and received this species from localities near 

 the sea-shore. In the form of the third antennal joint there is quite 

 a divergence from the typical Odontoniiio. A universal study of 

 this group may give it generic or subgeneric rank. Loew I'efers to 

 it as follows: "The last two segments of the third antennal joint in 

 this species forms a sufficiently acute style, as may be shown ; the 

 antenniie of this are not dissimilar to those of CUteUarkt, but the 

 downward course of the veins in this species demonstrates its place 

 in the Odontomyise." 



Odontoinyia puliescens Day (PI. iv, figs. 15. 16). 



Oduiilomi/iii piihe.icens Day, Proc. Acad. Nat. Sci. Phila. 1882, 77. 

 Length 9 10 nim. : wing 8 mm. — Face and front black with yellow pubescence, 

 which is lighter and longer on the face ; frontal longitudinal fossa with its mar- 

 gins and a spot on each side of the ocelli yellow. Antennfe black. Thorax black, 

 with short, golden-yellow pubescence ; scutellum black, apical margin and spines 



