ART. 11. FLIES OF THE FAMILY CLUSIIDAE MELANDER AND AEGO. 15 



15. Costal margin of wings more or less smoky from end of first vein; cheek bristlea 



small; antennae reddish. (Eur.; U. S.) geomyzina Fallen. 



Wings smoky on apical third and not along middle of costa 16 



16. Front tarsi entirely yellow, remainder of legs dusky 17 



Front tarsi more or less black, tibiae and femora in part piceous or black 18 



17. Face of male black; bristles of male cheeks strong; antennae yellow; hypopygium 



large. (Eur.; U. S.) apicalis Zetterstedt. 



Face of male white; buccal bristles and vibrissae moderate; antennae apically 

 brown; hypopygium rather small. (N. H.) terminalis, new species. 



18. Mesonotum shining; head reddish 19 



Mesonotum opaque-dusted; head almost wholly black (male); femora and tibiae 



black except extremities; antennae blackish. (Mass.; N. Y.). 



atra, new species. 



19. Femora mainly black; antennae tipped with brown; wings with only the apical 



third clouded. (Eur. ; N. Mex.) pictipes Zetterstedt. 



Femora yellowish ; third antennal joint mostly or wholly blackish ; a distinct cloud 



surrounding middle part of fifth vein (nitida, n. sp.) 20 



29. Scutellum and mesonotum black, except for the usual pale lateral margin 



(N. Mex.) nitida, new species, s. str. 



Scutellum and a large prescutellar spot yellowish. (Colo.). 



nitida, var. scutellata, new variety. 



17. CLUSIODES ALBIMANA Meigen. 



(Fig. 7.) 



Heteroneura albimana Meigen, Syst. Bes., vol. 6, p. 128 (1830). — Macquart, Hist. 

 Nat. Dipt., vol. 2, p. 588 (1835).— Zetterstedt, Dipt. Sc, vol. 7, p. 2790 (1840); 

 vol. 12, p. 4817, var. b. (1855).— Loew, Wien. ent. Monats., vol. 1, p. 51 (1857); 

 Berl. ent. Zts., vol. 8, p. 339 (1864).— Schiner, Faun. Austr., vol. 2, p. 38 

 (1864).— Ferris, Ann. Soc. ent. France, vol. 10, p. 344 (1870).— Brauer, 

 Zweifl. Mus. Wien, p. 92 (1883).— Ctirschner, Ent. Nachr., vol. 14, p. 98, figs. 

 5, 6 (1888).— Becker, Zts. Hym. Dipt., vol. 2, p. 313 (1902).— Czerny, Wien. 

 ent. Ztg., vol. 22, p. 81, pi. 1, fig. 5 (1903). 



Chisiodes alhimanu Johnson, Psyche, vol. 20, p. 98 (1913). — ^Malloch, Proc. Ent. 

 Soc. Wash., vol. 20, p. 6 (1918); Occ. Papers Bost. Soc, N. Hist., vol. 5, p. 47 

 (1922). 



Agromyza geomyzina Fallen, Dipt. Suec. Agrom., p. 3, var. b. (1823). — Zetter- 

 stedt, Ins. Lapp., p. 790, var. c. (1838). 



Heteroneura pictipes Schiner, Faun. Austr., vol. 2, p. 37 (1864). — Handlirsch, 

 Verh. Ges. Wien., vol. 34, pi. 5, fig. 12 (1884). 



Form pallidior Loew. Front liiteoiis, face, cheeks, moiithparts^ 

 and antennae yellow, upper occiput piceous, vibrissae relatively 

 smaller. Notum testaceous, sometimes piceous between humeri^ 

 two narrow dark vittae just outside dorsocentral rows; abdomen 

 black. Legs yellowish, front tibiae and front metatarsi brownish. 

 Wings and other details as in darlcer form. Length 3.5-4 mm. 



Form ohscurior Loew. Front blackish brown, orbits yellow, face 

 and palpi blackish; antennae yellow, last joint blackish, arista black 

 and very minutely pubescent; one pair of very strong porrect oral 

 vibrissae; usually three fronto-orbitals, the uppermost weak, bristles 

 black. Notum blackish brown, shining between humeri, lateral 

 margins yellow, pleurae shining piceous. Abdomen black, hypopy- 



