no .a;aixk agrut: ti-ral Expkriment station. 1912. 



Table of species. 



a. Wing spotless. . I. ignobilis. 



aa. Wings marked with brown central spot and preapical cloud. 



b. Preapical fascia of wing distinctly crosses the media; length 



2.5 mm. 2. ornati. 



bb. Preapical cloud diffuse, its long axis parallel to the long ax:s 



of the wing; length 4 mm. 3. varia. 



V I. Zygomyia iguobilis Loew. 



Berl. Ent. Zeitschr. XIII. 150. 1869. 

 Male and female. Length 2.5 mm. Fuscous, subopaque, 

 pile pale, appressed, setse black. Head black, antennae brown, 

 scape dusky yellow. Hypopygium yello'Cvish TFig. 97). Cox3e 

 and legs yellow, hind margins and tips of hind femora brown 

 to blackish ; spurs and tarsi brown ; middle tibiae each with oiie 

 small and one large seta on the flexor surface. Wings grayish 

 hyaline (Fig. 214). Halteres yellow. ''Middle States;" Ithaca, 

 N. Y. ] 



2. Zyyomyia oniafa Loew. 



Beid. Ent. Zeitschr. XIII. 150. 1859. 

 ]Male and female. Length 2.2-2.5 "''i''''- Head blackish, 

 antennae fuscous, scape, base of flagellum and palpi yellow ; 

 hairs pale. Thorax and abdomen fuscous, opt^que, pile pale, 

 setae black; hypopygium yellowish (Fig. 98). Coxae and Ieg> 

 yellow, tips of middle and hind femora and hind tibiae, more or 

 less dark brown, tarsi largely brown. Wing cinereous hyaline, 

 yellowish toward the costa, a brown central spot, a preapical 

 fascia, and a small less di.stinct spot behind the cubitus (Fig. 

 216). Halteres yellow. Wis.; Chicago, 111., (W.M.W.) Tune. 

 Aug.; Ithaca, N. Y., Aug. / i 



3. Zygomyia varia Staeger. 



Krojer: Tidskr. 266. 1840. (Mycetophila). 

 ]\Iale and feinale. Length 3 mm. Head and antenna brown, 

 scape and palpi usually yellow. Thorax and abdomen brown- 

 ish black subopaque ; humeri reddish yellow ; hypopygium dusk\- 

 yellow ; hairs brown with a yellowish tinge, appressed. Coxa- 

 and legs reddish or rusty yellow, the tarsi and spurs, the tip> 

 of the hind femora, the extensor 'surface of the last and a spot 



