416 CONNECTICUT GEOL, AND NAT. HIST. SURVEY [BulL 



Cell R3 of wings large, more than twice as long as its petiole (Fig. 44. K) ; 

 abundant macrotrichia on Rs and its anterior branch (i?*+3+4, i^3+4, Rs and 

 Ri) ; antennae ( $ ) short, if bent backward scarcely attaining the wing- 

 root microcera 



Hexatoma (Hexafoma) megacera ((). 8.) (Fig. 44, J). 

 1859. Anuomera megacera Osten Sacken ; Proc. Acad. Xat. Sci. Phil- 

 adelphia, 1859 : 242. 



Figs. — Osten .Sacken, Mon. Dipt. N. Amer., 4, pi. 2, fig. 12 (wing) ; 1869. 

 Williston, Man. N. Amer. Dipt., Ed. 3:84, fig. 25, sub 13 (ven.) ; 1908, as neglecta. 

 Needham, 23rd Rept. N. Y. St. Ent. for 1907, pi. 26. fig. 2 (ven.) ; 1908. Alexan- 

 der, Cfls. N. Y., 1:850, fig. 125. G (ant. 5), H (ant. 9); pi. 2,7, fig. 112 (wing); 

 1919. 



(leneral coloration of thorax brownish gray, the praescutum with 

 three darker brown stripes; pleura brown. Antennae of female short, 

 not attaining the wing-root. Wings with a browni.sh tinge, caused es- 

 pecially by somewhat darker seams along veins. Abdomen dark 

 brown. $. L, about 5-6 mm.; w. 5-6 mm.; antenna, about 7-0 mm. 

 9 . L. 6-7 mm. : w. 6-7.5 mm. 



(Mav, June) Que., N. H., Mass.. N. Y., westw. to Ind., southw. to Md. and Va. 



Connecticut.— Chapinville, Mav 26, 1904 (W. E. B.) ; Norfolk, Mav 31, 1931 (C. 

 P. A.). 



H. {HeQcatoina) m\CYOQ.eryi XXi^x. (Fig. 44. K). 



1926. Hexatoma microcera Alexander; Ent. Xew.<, 37 : 49-50. 



General coloration gray, the praescutum witli three more blackish 

 stripes. Legs .short and stout. Wings faintly tinged with brown. 

 5. L. 5.8-6.5 mm,; w. 7.1-8 mm. 



Known only from three male specimens in the Vienna Museum, 

 bearing the label "America borealis, 1867." The species has never been 

 re-discovered and may not be regional to the present report. 



Subgenus Eriocera Macijuart 



1838. Eriocera Macquart; Dipt. Exot., 1 : 74. 



1863. Penthoptera Schiner; Wien. Ent. Monatschr.. 7: 22(). 



The subgenus Eriocera is a vast group, best represented in the 

 tropics of l)oth the Old and Xew AVorlds. In the local fauna, it in- 

 cludes about fourteen sjjecie.s, some of which are rather difficult of 

 separation. The character of very elongate antennae in the male sex 

 is very striking, but. unfortunately, is not always correlated with other 

 characters in the female. The various species with such lengthened 

 antennae are often very close to others with the organ short in botli 

 sexes {spinosa^ hrachycerax toilsonii, aurata\ longicornu^ gaspetisis). 

 The adults of several of the species frequent the margins of major 

 streams having sand}' margins; aurata and imlsonii are found in south- 

 ern swamps and bogs; 'brachycera and spinosa are most often to be 

 found flying swiftly over the quiet pools of medium-sized mountain 

 streams; trisfis occurs in small dancing swarms in similar situations. 



