No. 64] DIPTERA OF CONNECTICUT : TAXONOMY 195 



Axymyia furcata McAtee. (Fig. 21, B). 



1921. Axymyia, furcata McAtee; Proc. Ent. Soc. Washington, 23: 49. 



Figs. — Coquillett, Ent. News, 20:106, fig. (ven.) ; 1909. Crampton, Ann. Ent. 

 Soc. Amer., 18, pi. 4, fig. 14 (thorax) ; 1925. Edwards, Gen. Ins., 190, pi. 1, fig. 9 

 (ven.) ; 1928. 



General coloration dark brown. Wings strongly suffused with 

 brown, more saturated on costal third; wing-base faintly yellowish; 

 a whitish spot in cell B above fork of Es. 5. L. 5-6 mm.; w. 6-7 

 mm. 



(Apr., May) Mass., N. Y., Pa., Va. (Canadian, high Transition). 



The occurrence of this very uncommon fly in New England has 

 been discussed by the writer (Occas. Pap. Boston Soc. Nat. Hist., 5: 

 115; 1924). Only two specimens have yet been taken in New England, 

 both on Mount Toby, near Amherst, Mass., where they were swept 

 from low herbage along a mountain stream. 



Subfamily Mycetobiinae 



General appearance much like a fungus-gnat, Mycetophilidae, 

 with which group it was long associated. 



Eyes finely pubescent, only narrowly separated on vertex. No 

 definite ocellar tubercle. Maxillary palpi 3-segmented. Praescutal 

 and scutal setae well-developed; scutellum with four marginal setae. 

 No macrotrichia on wing-membrane; well-developed and strong on 

 all of the non-evanescent veins ; G extending to some distance beyond 

 tip of i?5. The following veins are faint and tend to become evanes- 

 cent : Base of 8c^ branches of M and extreme outer end of the main 

 stem of M^ outer half of Gux and A ; the basal portion of the main 

 stem of J/, together with Cu,^ are quite atrophied. R and all of its 

 branches, together with Gu^ are well-preserved and provided with nu- 

 merous macrotrichia. 



Mycetobia Meigen 



1818. MycetoUa Meigen; Syst. Beschr., 1: 229. 



1861. Mycetoica Rondani; Prodr. Dipt. Ital., 4, Corrig., : 12. 



The larvae live in the fermenting sap of trees, in decaying wood, 

 and in similar places showing organic decay, where they are sometimes 

 associated with the larvae of Anisopus. The immature stages have 

 been discussed in detail by Johannsen (Maine Agr. Expt. Sta. Bull. 

 177: 31-32, figs. 38-43; 1910), Keilin (Ann. Mag. Nat. Hist., (9) 3: 

 33-35, pi. 2, fig. 2; 1919) and Edwards (Gen. Ins., 190: 24, pi. 2, figs. 

 6-9; 1928). The adult flies occur on tree trunks near exuding sap 

 and more rarely may be found on windows in houses. 



Mycetobia divergens Wk. (Fig. 21, C). 



1856. Mycetobia divergens Wa&er; Ins. Saund., Dipt., p. 418. 

 1867. Mycetoyhila -persicae Eiley ; Prairie Farmer, 35 : 397. 

 1869. Mycetobia sordida Packard; Guide Study Insects, p. 388. 

 1903. M. marginalis Adams ; Kan. Univ. Sci. Bull., 2 : 21. 



