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



Considered by Edwards as being possibly only a heavily pat- 

 terned variety of 'macuUpennis. Still known only from the unique 

 type. 2 . L. 6,5 mm. ; w. 7 mm. 



(Oct.) Pa. 



Family ANISOPODIDAE 



by Charles P. Alexander, Ph. D. 

 Massachusetts State College 



1928. Anisopodidae. Edwards, Genera Insectorum, Fasc. 190: 7-2G, 

 2 pis. 



Head somewhat flattened, not produced behind. Ocelli three, 

 forming a close equilateral triangle. Fronto-clypeal suture lacking; 

 labrum reduced, membranous. Mesonotal praescutum and scutum not 

 evidently separated by a transverse suture; pleurotergite undivided. 

 Tibial spur-formula 1-2-2; claws simple. Wings with three bran- 

 ches of R reaching margin (Fig. 21, A-C) ; i?3 preserved as a distinct 

 element in Axymyia (Fig. 21, B), uniting with .^i+o far distad; Rs 

 straight, oblique, in direct alignment wdth basal section of ^^5; r-7n 

 distinct; cell 1st M2 closed (Anisopvs, Fig. 21, A) or open by atrophy 

 of outer veins; distal section of Cui sinuous (Anisopus) or straight; 

 a single preserved Anal vein. 



Three diverse grouj)s are here included, the habits being briefly 

 discussed under the subfamily headings. 



Key to Subfamilies and Genera 



1. Cell 1st M2 closed; M with four branches (Fig. 21, A) ; cells of wing with 



abundant macrotrichia ( Anisopodinae) Anisopus 



Cell 1st M2 open ; M with three branches (Fig. 21, B, C) ; cells of wing with- 

 out macrotrichia 2 



2. Vein Rs present as a distinct element near tip of R1+2, forming an apical fusion 



of Ri+2+3: r-m oblique placed at or beyond midlength of M1+2, in cases 

 close to fork of vein; main stem of M preserved (Fig. 21, B) 



( Axymyinae) Axymyia 



Vein R:: atrophied; r-m transverse, placed far before fork of il/u-; main 

 stem of M chiefly atrophied (Fig. 21, C) (Mycetobiinae) Mycetobia 



Subfamily Anisopodinae 



Anisopus Meigen 



1800. Phrtjne Meigen; Nouv. Class. Mouches, p. 16 (nom. nud.). 

 1803. Anisojms Meigen; Illiger's Mag., 2: 264 (nom. nud.); 1804, 



Klass., 1 : 102. 

 1805. RTiyphus Latreille ; Hist. Nat. Crust. Ins., 14 : 291. 



The immature stages occur in or near decaying organic matter, 

 as m manure and fermenting sap. The early stages have been de- 

 scribed and figured in detail (Keilin, Ann. Mag. Nat. Hist., (9) 3, 

 pi. 2, fig. 1; 1919. Edwards, Gen. Ins., 190: 11-12, pi. 2; 1928). The 

 adult males swarm in small to larger groups, mating taking place 



