18 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.64 



vibrissae, head bristles strong and black, three fronto-orbitals, post- 

 verticals long. Notum blackish, with a whitish lateral stripe extend- 

 ing full length, pleurae piceous, two strong dorsocentrals, and a small 

 adjacent anterior one. Abdomen blackish, hypopygium robust, 

 valves large, quadrate, nearly glabrous, the middle of the apical edge 

 with a strong finger-like process. Coxae white, legs uniformly yellow- 

 ish. Wings grayish with apical third between costa and tnird veins 

 infuscated, third and fourth veins centrally divergent and apicaUy 

 convergent, sections of costa 6 : 1.7 : 1, of fourth vein 1.4 : 1 : 4, of 

 the evanescent fifth vein 1.2 : 1; halteres whitish. Length 3 mm. 



Distribution. — A robust species, reported from Svv'eden to Germany. 

 The specimens described above are from Moscow Mountain, Idaho, 

 collected by Shannon and Melander. Malloch's record of the occur- 

 rence of this species in Illinois probably concerns C. terminalis. 



23. CLUSIODES (CLUSIARIA) ATRA, new species. 



(Fig. 9). 



Male. — Front piceous except the yellowish orbits and anterior 

 fourth, face, cheeks, and occiput blackish, facial orbits white; anten- 

 nae blackish, arista one and one-half times the antennal length and 

 microscopically pubescent; mouthparts yellow, vibrissa single, short 

 and curved, buccal setae strong; three fronto-orbitals. Notum dull 

 black, humeri and lateral margin white, pleurae shining black. 

 Abdomen black, hypopygium semiglobose, valves very large, incised 

 subapically and with round end. Legs blackish except at knees, 

 posterior tarsi brownish. Wings grayish hyaline, with an infumation 

 on the apical third between the costa and the third vein, costal ratio 

 4.5 : 1.3 : 1, sections of fourth vein 1.2 : 1 : 4.3, of fifth vein 1.1 : 1, 

 fifth vein scarcely attaining margin, second and third veins diverging; 

 halteres whitish. Length 3.6 mm. 



Type. — Greenfield, Mass., 1 June, 1914 (Melander). Paratype, 

 Ithaca, N. Y., 3 May, 1903 (Cornell University). 



24. CLUSIODES (CLUSIARIA) GEOMYZINA Fallen. 



Heteroneura geomyzina Fallen, Dipt. Suec. Agromyz, p. 2, excl. var. b (1823). — 



Meigen, Syst. Bes., vol. 6, p. 129, male (1830). — Zetterstedt, Dipt. Sc, vol. 



7, p. 2788 (1848).— Schiner, Faun. Austr., vol. 2, p. 38 (1864).— Loew, Berl. 



ent. Zts., vol. 8, p. 345 (1864).— Czeexy, Wien. ent. Ztg., vol. 22, p. 77 (1903). 

 Agromyza geomyzina Zetterstedt, Ins. Lapp., p. 790, var. 6 (1838). 

 Clusiodes geomyzina Johnson, Psyche, vol. 20, p. 97 (1913). — Malloch, Proc. 



Ent. Soc. Wash., vol. 20, p. 6 (1918). , 

 Clusiaria geomyzina Malloch, Occ. Papers Bost. Soc. Nat. Hist., vol. 5, p. 48 



(1922). 

 Heteroneura alpina Loew, Wien. ent. Monats., vol. 1, p. 53 (1857); Berl. ent. 



Zts., vol. 8, p. 344 (1864).— GiRSCHNER, Ent. Nachr., vol. 14, p. 98, figs. 7, 8 



(1888). 



Robust. Head blackish, the orbits, antennal region and posterior 

 cheeks yellowish, mouthparts yellow, antennae blackish on apical 



