ADAMS : DIPTEROLOGICAL CO^JTRIBUTIONS. 33 



claws, except apex, yellow ; wings slightly infuscated, yellow- 

 ish towards base, veins brown. Length, 4.5 mm. 



Habitat ? 



This species stands between 0. abbreviata Loew. and 0. baroni 

 Will., agreeing with the former in coloration and with the 

 latter in size and length of the antennal joints. It differs from 

 the latter in the femora, being wholly blackish. 



Zodion.— ^'o&^e to the sjiecles. 



1. Scutellum triangular, thorax with opaque and black spots. . .pictulum Will. 

 Scutellum oval 2 



2. Very small species, rarely 4 mm. long 3 



Larger species 5 



3. First posterior cell closed parvus, n. sp. 



First posterior cell open 4 



4. Sixth and seventh abdominal segments reddish nanellum Loew. 



Sixth and seventh abdominal segments in general color black, 



pygmceum Will. 



5. First posterior cell closed ,. 6 



First posterior cell open 9 



6. Palpi quite long, clavate palpalis Robt. 



Palpi not long and clavate 7 



7. Petiole at distal end of first posterior cell longer than the small cross- 



vein scapularis, n. sp. 



Petiole shorter than the cross- vein 8 



8. Abdomen largely rufous bicolor, n. sp. 



Abdomen largely black abitus, n. sp. 



9. Posterior part of abdomen golden yellow auricaudatum Will. 



Abdomen not so colored 10 



10. Thorax with a pair of median pollinose stripes; abdomen with oblique 



pollinose spots on at least the third segment ohliquefasciata Macq. 



Thorax pollinose, with at least two slender black stripes; abdomen 

 more uniformly pollinose fulvifrons Say. 



Zodion obliquefasciata Macq. 



Myopa ohliquefasciata Macq., Dipt. Exot. ler Suppl., 141, 1. 

 Zodion sjilendens Jaen., Neue Exot. Dipt., 405, Mexico. 

 Zodion leucostoma Will., Trans, Conn. Acad., VI, p. 380. 



Specimens received through exchange from Prof. C. W. 

 Johnson, and bearing the name Z. obliquefasciata Macq., led me 

 to believe that the above synonymy is correct. 



Zodi n abitus, n. sp. 



Female : Black, grayish pollinose ; face and cheeks yellow, in 

 some light silvery, front black on upper part, fulvous near an- 

 tennae, occiput black on upper half, proboscis black, palpi small, 



