THE MYCETOPHII^IDyS; OE* NORTH AME;rICA. 24I 



4. Genus Hcsperodcs Coquillett. 



Hespcrodes Coquillett, Entomol. News. XI. 429. 1900. 



Subcosta (fig. 89, diagrammatic) ends in the costa beyond 

 the base of the radial sector; the subcostal crossvein is nearly 

 midway between the humeral crossvein and the base of the 

 radial sector, the latter forks beyond the apex of Ri ; the media 

 originates near the base of the wing and just before the union 

 with the radial sector connected by the crossvein with Cui, and 

 forking a short distance beyond the union with the radius ; 

 cubitus forking midway between the base of the radial sector 

 and its union with the media; anal vein prolonged to the wing 

 margin. Antennae about twice as long as the head and thorax 

 united, cylindrical but tapering to the apex; 2-I-14 jointed, the 

 first joint as broad as long, the second twice as broad as long, 

 and the others twice as long as broad ; proboscis very robust, 

 shorter than the height of the head; palpi 4 jointed, eyes emar- 

 ginate opposite the antennae ; ocelli wanting. Abdomen slender, 

 more than 3 times as long as the thorax. This genus, while 

 superficially resembling Hesperimis in venation is a true Myce- 

 tophilid and more closely allied to Apenion, Platyura, etc. 



Hesperodes johnsoni Coquillett. 

 1900. johnsoni, Coquillett, Entomol. News. XL 429. 

 Male. Length 12 mm. Reddish yellow, antennas and tarsi 

 beyond the base changing to brown, legs destitute of strong 

 lateral bristles, tibial spurs well developed ; wings yellowish, 

 becoming grayish hyaline on the posterior margin and at the 

 apex, a brown, spot at apex of Ri. Delaware Water Gap. N. J. 

 July. 



5. Genus Apcuwn Johannsen. 

 Apenion, Johannsen, Genera Lisectorum, Mycetophilidas. 20. 



1909. 

 Resembles Platyura but differs in having a distinct, though 

 delicate, fold-like basal portion of the media arising near the 

 base of the wing, and in having no setae, but only fine hairs upon 

 head, thorax, coxae and femora. The setos of the abdomen, 

 tibiae and tarsi very small and inconspicuous. Antennae 24-14 

 jointed, flagellar joints cylindrical, under 20 diameter magnifi- 



