384 CONNECTICUT GEOL. AND NAT. HIST. SURVEY [Bull. 



Subgenus Idioptera Macqiiart 



1834. Idioptera Macquart; Suit, a Buffon. 1, Hist. Xat. Ins. Dipt. : 94. 



The subgenus Idioftera is represented in the local fauna by a 

 single rather uncommon species. The adult flies frequent sparsely 

 wooded marshy and boggj' areas. The early stages occui- in rich or- 

 ganic mud. 



Limnophila {Idioptera) fasciolata O. S. (Fig. 43, M). 

 18()9. LininophUa fasciolata Osten Sacken; Mon. Dipt. N. Amer.. 4i 

 206-207. 



Fig.— Alexander, Cfls. N. Y., 1, pi. 38, fig. 115 (wing) : 1919. 



Head and anterior part of mesonotum dark brown, the posterior 

 sclerites of notum and the pleura more yellow, the latter with a trans- 

 verse brown girdle occupying the anepisternum and sternopleurite. 

 Antennae ( $> ) elongate, approximately one-half the body ; flagellar 

 segments long-cylindrical, w'ith a delicate white pubescence and with 

 verticils at near midlength that are shorter than the segments; in ?, 

 antennae short, extending to just before wing-root. Legs yellow to 

 whitish, the tips of femora broadly, of tibiae more narrowly, black- 

 ened. Wings relatively narrow, whitish subhyaline, with a heavy 

 brown cross-banded pattern. In 2 , wings slightly reduced in size, 

 with the pattern somewhat heavier. Abdomen ( 5 ) elongate, obscure 

 yellow, the segments narrowly bordered by brown ; liypopygium chief- 

 ly blackened. Male liypopygium with the outer dististyle terminating 

 in a single curved spine. ^. L. about 6.5-7 mm.: w. 6.5-8 mm. ?. 

 L. 7-7.5 mm. ; w. 6.5-6.8 mm. 



(June) Me., Mass., Ct., N. Y., westw. to Mich. 

 Connecticut.— Manitic Lake. June 8-9, 1929 (C. P. A.). 



Subgenus Elaeophila Rondani 



1856. Elaeophila Rondani; Prodr. Dipterol. Italicae, 1: 182. 

 1864. Ephelia Schiner ; Wien. Entomol. Monatschr., 7 : 222. 



There seem to be no suflicient grounds on which we can refuse to 

 use the name ElaeopJiila {Eloeophila) for the group that has until re- 

 cent date been called Ephelia. Tlie essential characters of the sub- 

 genus lie in the presence of a supernumerary cross vein in cell M^ in 

 conjunction with the short antennae in both sexes, and the fundamen- 

 tals of structure of the male liypopygium, especially the rather pecu- 

 liar structure of the outer dististyle (Fig. 45, C-J). The adult flies 

 rest on rank vegetation in woods and shaded gorges, more especially 

 along streams of various sizes, the nature of the latter to some ex- 

 tent governing the species. Thus, aprilina tends to frequent small 

 rills, while sabrinu and johnsoni occur especially along the margins of 

 larger streams. The early stages live in rich organic mud near the 

 haunts of the adult. 



