316 Annals Entomological Society of America [Vol. X, 



Reared from Pleiirotus ostreatus, Polyporus siilphureus, 

 October and December, 1915, California Redwood Park. 

 Type No. 569-1, L. S. J. U., Entomological Museum. 



Va. *Genus Johannseni n. genus. 



Front narrow; 2 lateral ocelli contiguous to eye margin; 1st and 

 2nd palpal joints slightly swollen, 1st little longer than 2nd, 3rd nearly 

 equalling 1st and 2nd in length. Antennae as long as thorax, slightly 

 tapering toward tip. Abdomen compressed. Hypop^^gium of male small 

 (Plate XXVI, Fig. 3, 4, 5, 0,). Legs short, femora moderately broad, 

 flattened; tibia strong, enlarged at ends, with long spurs and strong 

 setae. Posterior basal setse of hind coxae present. Subcosta short, ending 

 in R, ; costa not produced beyond the Rs. Fork of media under base of 

 Rs. Cubitus forks distad of fork of M. Anal vein long and stout, 

 reaching below fork of Cu. (Plate XXVI, Fig. 2b). 



Differs from Brachypeza in wing venation, and antennal 

 structure; from Allodia in structure of tibia, wing markings 

 and size of tibial setae; from both in having but two ocelli, 

 and in the presence of the strong first anal vein. 



Reared from Polyporus siilphureus. October. 



Type specimens deposited in museum collection at Stanford 

 University. 



Vb. Johannseni aurei n. sp. 



Male: 5 mm. long. Robust. Antennae as long as thorax; scape 

 yellow; flagellum brownish. Palpi, proboscis and face yellow; vertex 

 with darker transverse fascia. Hairs yellow; on each side a row of 

 brown setae extending ventrad from ocellus over the gena. Tnorax 

 yellow; scutellum with two basal brown spots, 4 marginal setae. Row 

 of yellow hairs on anterior margin of mesonotum. Pleurae yellow. Ab- 

 domen reddish-yellow; hypopygium small (Plate XXVI). Coxae and 

 legs yellow, stout, tibia broadened at end. Femora reddish-brown at 

 tips; tarsi brownish. Wings grayish hyaline with central black spot. 

 Large preapical fascia, and cloudy about the margin. (Plate XXVI, 

 Fig. 2b). Halteres yellow. 



Female same. 



Reared from Polyporus sulphureus. October. California 

 Redwood Park. 



Type No. 569-7-1, L. S. J. U., Entomological Museum. 



*I take pleasure in naming thi.s genus for Professor Johannsen of Cornell 

 University, who kindly compared my new species with tyjjes of nearly related 

 species. 



