THE CANADIAN ENTOMOLOGIST 129 



SOME NEW SPECIP:S of LONCH/EID.4^. from AMERICA (DIPTERA). 



BY J. R. MALLOCH, 

 Urbana. 111. 



The species described in this paper belong to the genus Lonchaea which 

 contains a large number of forms which superficially resemble each other very 

 closely, but which upon examination are easily separated in most cases by 

 means of characters usually ignored by systematists. In the descriptions here 

 presented I have introduced some of the most useful of those characters, and 

 as I have in preparation a key to the species occurring in America and Canada, 

 I have not made a lengthy comparison of allied forms in this paper, depending 

 upon the publication of the key to make the relations clear. 



Lonchaea aterrima, sp. n. 



Male. — Glossy black, without any evident bluish tinge. Frons opaque 

 black, upper orbits shining, subgranulose, not glossy; antennae black. Wings 

 slightly brownish, veins brown. Calyptrse brownish, fringes fuscous. Legs 

 black, basal two or three tarsal segments yellowish. Halteres black. 



Eyes bare; frons at vertex a little less than one-fifth of the head-width, 

 narrower anteriorly; marginal and interfrontal hairs long, the latter in two series; 

 frontal lunule bare; third antennal segment about 1.5 as long as wide; second 

 segment of arista nearly twice as long as thick; hairs on cheek long, not dense. 

 Thoracic bristles not ver}- strong, those on scutellum not much more conspicuous 

 than the numerous marginal hairs; two or three hairs at base of stigmatal bristle; 

 pteropleura bare. Hind femur without any outstanding antero-ventral bristle 

 near apex; hind tarsus with the basal segment slightly incrassated. 



Female. — Frons broader than in male, at vertex one-third of the head- 

 width, the interfrontalia with the hairs more irregularly arranged and more 

 numerous; third antennal segment broader than in male. Ovipositor very 

 distinctly broader than in any other described American species, acute at apex, 

 the apical hairs very short. 



Length 3.5-4 mm., exclusive of ovipositor. 



Type, male, and allotype, Orono, Me., May 19, 1912, (H. M. Parshley). 

 Paratypes, two females, Mt. Washington, N. H., July 4 and 6, 1914, alpine 

 garden, and 2,500 feet altitude (C. W. Johnson). Type and allotype collection 

 of Boston Society of Natural History. 



This species belongs to the subgenus Earomyia. 



Lonchaea hirta, sp. n. 



Male. — Glossy black, thoracic dorsum with faint violet and blue reflections, 

 abdomen distinctly bluish. Tarsi yellowish testaceous, apical two and part of 

 third segment fuscous. Wings whitish, distinctly infuscated at bases, veins 

 very pale, darkened at apices. Calyptrae brown, fringes fuscous. Halteres 

 black. 



Eyes with sparse, almost indistinguishable short hairs; frons at vertex 

 about one-fourth of the head-width, narrowed anteriorly, with numerous long 

 erect hairs, some hairs caudad of the orbital bristle; third antennal segment at 

 least three times as long as its greatest width ; cheek with dense, erect, stiff black 

 hairs of a uniform length. Dorsum of thorax with longer and more dense hairs 



June, 1920 



