AKT. 11. FLIES OF THE FAMILY CLUSIIDAE MELAlsTDER AND ARGO. 19 



half, arista one and a half times the antenna! length, microscopically 

 pubescent, three fronto-orbitals, the cruciate bristles near the middle 

 fronto-orbitals, postverticals present. Thorax black, the humeri 

 and side margins of mesonotum yellow, two strong and one weak 

 dorsocentrals, pleurae piceous. Abdomen black, hypopygium robust, 

 valves large, flat, rhomboidal. Legs dull yellow. Halteres including 

 stem wliitish. Wings dusky along costa, about crossveins and in 

 apical region excepting the hind margin, third and fourth veins 

 slightly converging in the apical cloud, anterior crossvein a little 

 beyond middle of discal cell, fifth vein reacliing margin, its sections 

 proportioned 6 : 5. Length 3.25 mm. 



Distrihution. —Sv/eden and Norway to Austria and Italy. Recorded 

 by Johnson from Maine. The present specimens were collected by 

 R. C. Shannon at Mount Lemon, South Catalina Mountains, Arizona 

 at an altitude of 8,000 feet. 



25. CLUSIODES (CLUSIARIA) MELANOSTOMA Loew. 



(Fig. 4). 



Heteroneura melanostoma Loew, Berl. ent. Zts., vol. 8, p. 260; Cent. 5. 97 (1864). — 



CzERNY, Wien. ent. Ztg., vol. 22, p. 77 (1903). 

 Clusiodes melanostoma Johnson, Psyche, vol. 20, p. 98 (1913). — Malloch, Proc. 



Ent. Soc. Wash., vol. 20, p. 5 (1918). 

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



(1922). 

 Clusiaria duplicata Malloch, Occ. Papers Bost. Soc. Nat. Hist., vol. 5, p. 49 



(1922). 



Alale. — Front testaceous, the ocellar spot black, antennae yellow- 

 ish, dusky at apex, arista very lightly pubescent, one and one-half 

 times the antennal length, face black, anterior half of cheeks black, 

 posterior half, orbits and mouthparts whitish; one, two or more 

 pairs of very strong vibrissae equal in length and projecting as far 

 as length of head, three buccal bristles, three or two fronto-orbitals. 

 Mesonotum rufous, the sides reddish brown, humeri, notopleural 

 suture and upper pleurae deeper brown, lower pleurae yellow, 

 metanotum more or less blackish. Abdomen blackish, hypopygium 

 large, globose, valves prominent, distorted rhomboidal, the outer 

 apical angle prolonged in a spoon-shaped process, the inner apical 

 angle projecting in a strong thumb-like piece. Wings grayish, 

 apical third between costa and fourth vein iiuascated,^ a slight 

 infuscation about posterior crossvein, sections of costa 5 : 1.5 : 1, of 

 fourth vein 1.3 : 1 : 4.5, of fifth vein 1.3 : 1; halteres white. 



Female. — -Face yellowish, a single normal vibrissa. 



Distribution. — Recorded localities include Maine, New Hampshire, 

 Vermont, Massachusetts, New Jersey, Maryland and Canada. The 

 type, from New York, is in Agassiz Museum of Harvard University. 

 The specimens before us have come from Mount Washington, N. H.; 



