DIPTERA— MYCETOPHILIDiE. 37 



Mycetophlla umbraticus Aldrich. 

 Rep. Ind. Geol. Sur., xxi, 1896, 187 (Shiloh Cave); Cat. N. A. Dip., 1905, 146. 



Very common. One of the most abundant Mycetophilidse in the cave. 

 It has been taken from near the mouth to the mound, and once beyond. 

 It is often quite abundant, especially from near the mouth to " 17, "and 

 is fairly common to the mound at all seasons. Blatchley took a single 

 specimen of this species from Shiloh Cave and from it this species was 

 described. 



The following is self-explanatory: 



NEW SPECIES OF MYCETOPHILA. 



By 0. F. Adams, Chicago. 



In looking over some Diptera from Mayfield's Cave, Indiana, I have come across 

 two forms which I believe to be new. The material was collected by Mr. A. M. 

 Banta, of the University of Indiana, and my thanks are due him for the privilege of 

 studying the collection. 



MYCETOPHILA ANALIS n. sp. 



Male. Head brownish-black, mouth parts and basal joints of antennae yellow, 

 remaining joints of antennae light brown. Thorax brownish-black, lateral margins of 

 mesonotum and the pleurae brownish-yellow; mesonotum with short yellow pile and 

 black bristly hairs, the latter distributed along the sides; scutellum with an apical pair 

 of strong bristles. Abdomen brownish-black, apex yellow, with short yellow pile. 

 Coxae yellow, femora light yellow, tibiae and tarsi becoming darker distally; the front 

 tibiae are without bristles, except the apical ones, the second are provided with a 

 row of indistinct setulaa, and the hind tibise have rather strong bristles; front tarsi a 

 little over twice as long as front tibise, middle tarsi about twice as long as middle 

 tibiae, hind tarsi 1.5 times as long as their tibiae. Wings nearly hyaline; third vein 

 and anterior branch of the fourth vein divergent distally, furcation of fourth vein in 

 front of base of third vein, furcation of fifth vein considerably posterior to it. Halteres 

 light yellow. Length 4 mm. 



One specimen. Taken just within entrance of cave, March 18, 1904. 



MYCETOPHILA INCERTA n. sp. 



Male. Head dark brown, mouth parts and basal joints of antennae yellow. 

 Thorax obscure yellow; mesonotum with two V-shaped figures, one set within the 

 other, resulting from the fusion of the two lateral stripes posteriorly, and with the 

 median one between them being divided anteriorly; scutellum and metanotum brown, 

 former with an apical pair of bristles; mesonotum with short yellow pile laterally 

 ■viith. black bristles. Abdomen obscure yellow, base of each segment dark brown 

 dorsally, on the posterior segments this color comes to encircle the segment; the short 

 pile is black. Legs light yellow, tarsi becoming tinged with brown; besides the long 

 apical bristle the middle and hind tibise have each a row of shorter bristles; anterior 

 tarsi twice as long as their tibiae, middle tarsi 1.5 times as long, and the hind tarsi 

 as long as their respective tibiae. Wings hyaline; third vein and anterior branch of 

 fourth vein divergent, furcation of fourth vein beyond base of third vein. Halteres 

 light yellow. Length 4 mm. 



One specimen. April 9, 1903. 



