REPORT OF THE STATE ENTOMOLOGIST I917 197 



colored or whitish larvae occurring in a large, yellowish fungus 

 growing on rotten bark. The infestation was an abundant one, 

 the larvae occurring, according to Mr Pergande, by millions and 

 jumping about like flies even to a distance of 5 or 6 inches. 



Mycodiplosis altemata Felt 



1907 Felt, E. P. N. Y. State Mus. Bui. no, p. 126-27; separate, p. 30 



1908 N. Y. State Mus. Bui. 124, p. 402 



The mottled brown male was taken June 11, 1906 on Mayapple, 

 Podophyllum peltatum, at Albany, N. Y. It was 

 swept from sugar maple, Acer saccharum, and white pine, 

 Pinus strobus. In general color characters this species 

 agrees very well with Diplosis maccus Loew ^ and may 

 prove to be a synonym. The antennal coloration is also similar to 

 that of Cecidomyia atricornis Walsh. 



Male. Length 1.5 mm. Antennae probably longer than the body, 

 thickly haired, alternately yellowish and reddish, the larger 

 enlargement of the segments lighter, the smaller and the distal portion 

 of the stem darker; 14 segments, the fifth with stems two and two 

 and one-half times their diameters, respectively. Palpi; the first 

 segment subquadrate, swollen distally, the second more than twice 

 the length of the first, narrowly rectangular, the third a little longer, 

 more slender, the fourth one-fourth longer than the third, slightly 

 dilated distally; face dark brown. Mesonotum dark brown, with a 

 narrow, median, yellowish area posteriorly, submedian lines yel- 

 lowish, sparsely clothed with fine setae. Scutellum yellowish red, 

 dark brown laterally, postscutellum dark brown. Abdomen some- 

 what mottled with brown, darker laterally, the segments thickly 

 clothed with fine, yellowish hairs. Wings subhyaline, costa light 

 brown; membrane indistinctly mottled with yellowish, there being 

 a distinct yellowish area at the base of the wing, which extends along 

 the anterior margin to another yellowish area at the basal third; 

 an indistinct yellowish area at the apical third and the anterior 

 margin and also a subapical yellowish area; there are three indistinct 

 yellowish areas between the third vein and the fifth, the first just 

 beyond the middle, the second near the apical fourth and the third 

 subapically; another yellowish area lies on the posterior margin just 

 behind the fifth vein, and one near the anal angle close to its branch ; 

 halteres and coxae yellowish transparent, femora pale yellowish 

 with rather indistinct, brownish annulations basally and subapically ; 

 tibiae pale yellowish with more distinct fuscous annulations sub- 

 basally and apically; tarsi, the first segment yellowish fuscous; the 

 others yellowish orange or pale orange and with distinct fuscous 

 annulations distally, except the last segment, which is pale orange. 



1 Loew, Hermann. Mon. Dipt. N. Am., i : 187-88. 1862. 



