Xo. 64] DIPTERA OF COXNECTICUT : TAXOXOMY 309 



much like parietina; gonapophyses slender, with pale lateral flanije. 

 $ . L, 8 - 9 mm.: w. 8.5-10.5 mm. $ . L. 9 - 11 mm.; w. 10 - 11 mm. 



(July, Aug.) Ont.. Que., N. B.. Me., N. H., Vt., Mass., N. Y., Pa., westw. to 

 Mich., Wise, and Alta., southw. to Va., N. C. and Tenn. 



On the structure of the male hypopygium. the local species of 

 Limonia^ So 1., fall in the following groups, based on the progressive 

 specialization of the structure of the dististyle. 



1. Dististvle single, entire. — globithorax, indiqena, parictina, iris tit/ma. 

 (Fig. 34. J, K, M) 



2. Dististyle single but more or less split, at least on apical half, forming an 



incomplete dorsal dististyle. — cinctipes, fallax, hiidsonica, immatura, no- 

 vae-angliac, solitaria, trioceUata. 

 (Fig. 34, H, L, P) 



3. Dististyle so divided that the dorsal dististyle is complete to base, as in the 



subgenus Dicranomxia. — fitsca, vara, simulans. 

 (Fig. 34, I, N, O) 



In the last major paper on the Tipulidae that he wrote, Edwards 

 (Trans. Soc. British Ent., 5:1-168, 31 figs., 5 pis.; 1938) has divided 

 the British species of the subgenus Limonki into two subgeneric groups 

 and this division is equally applicable to the species in our local fauna. 

 The restricted subgenus Limonia Meigen would include the species in 

 group 1, above (in key, couplets 13-17, including hadia, indigenan 

 maculicosta., pariefina., sociaMlis and tristigma). For the species of 

 group 2 (in key, couplets 7-12, inclusive), the name Metalimnohia 

 Matsumura (1911) is available (including cinctipes, fallax, hudsonica, 

 immatura, novae-angliae, solitaria and trioceUata) . 



Subgenus Discobola O. S. 



1865. Discolola O.sten Sacken: Proc. Ent. Soc. Philadelphia. 4:226. 

 1869. Trochohola Osten Sacken ; Mon. Dipt. X. Amer., 4 : 98. 



A widely distributed group, including more than a score of 

 species that show a curious discontinuous distribution, there being 

 about a dozen species in Xorth America and Eurasia, with almost as 

 many more in Xew Zealand and eastern Australia. The adults of our 

 local species seem especially characteristic of evergreen woods. 



Key to Species 



1. Knobs of halteres with conspicuous pale apices ; wings with a heavy ocellate 



pattern but without other brown areas in the interspaces annulata 



Knobs of halteres entirely dark brown ; wings with a more delicate ocellate 

 pattern, with additional brown dots in certain cells, especially .1/. where 

 there is a continuous series along vein Cu nigroclavata 



Limonia {Discobola) annulata (Linnaeus) (Fig, 37, A). 

 1758. Tipula annulata Linnaeus; Syst. Xat., Ed. 10: 586. 

 1824. Limnohia argus Say; Long's Exped. to St. Peter's R., 2, Ap- 

 pendix :358. 

 1869. Trochohola argus Osten Sacken : Mon. Dipt. X. Amer., 4 : 98-99. 



