No. 64] DIPTERA OF CONNECTICUT : TAXONOMY 183 



Family TANYDERIDAE 



by Charles P. Alexander, Ph. D. 

 Massachusetts State College 



1927. Tanyderidae. Alexander, Genera Insectorum, Fasc. 189 : 1 - 13, 

 pi. 



Antennae with from 15 to 25 segments, 16 in the local species. 

 Eyes densely short-hairy; no ocelli. Laterocervical plate large to 

 very large. Pronotum massive; metanotum reduced. Tibiae with 

 spurs. Wings (Fig. 18) with five branches of Radius, the forks of 

 ^6- dichotomous; cell 1st M2 closed, elongate; a single developed Anal 

 vein; anal angle prominent. Hypopygium with a single dististyle, 

 bifid in the local species. Ovipositor with short, fleshy valves. 



Figure 18. Protoplasa fitchii (O. S.) ; venation. 

 Symbols: A, Anal; M, Media; R, Radius; Sc, Subcosta. 



Protoplasa Osten Sacken 



1859. Protoplasa Osten Sacken; Proc. Acad. Nat. Sci. Philadelphia, 



1859: 252. 

 1878. Idioplasta Osten Sacken; Cat. Dipt. No. Amer., p. 222. 



As now restricted (Alexander, Annot. Zool. Japonenses, 13 : 275 ; 

 1932), the genus Protoplasa includes only the single species discussed 

 herewith. It is readily told from the other genera of the family by 

 the presence of a supernumerary cross vein in cell Mz of the wings 

 (Fig. 18). 



Protoplasa fitchii O. S. (Fig. 18). 



1859. Protoplasa fitchii Osten Sacken; Proc. Acad. Nat. Sci. Phil- 

 adelphia, 1859 : 252. 



Figs. — Osten Sacken, Mon. Dipt. N. Amer., 4: 317, fig. 7 (ven.) ; 1869. 

 Needham, 23rd Rept. N. Y. St. Ent. for 1907, pi. 15, fig. 1 (ven.) ; 1908. Alex- 

 ander, Cfls. N. Y., 1: 862, fig. A (ven.), pi. 30, fig. 1 (wing); 1919. Alexander, 

 Gen. Insect., Fasc. 189, Tanyderidae, fig. 11 (ven.), fig. 14C (hyp.); 1927. Corn- 

 stock, Introd. Ent., p. 796, fig. (ven.) ; 1924. Crampton, Ann. Ent. Soc. Amer., 

 18, pi. 1, fig. 7 (thorax) ; 1925. Crampton, Ent. News, 37, pi. 3, fig. 4 (thorax) ; 

 1926. MacGillivra)', Extern. Insect Anat., p. 323, fig. 47 (ven.) ; 1923. Williams, 

 Journ. N. Y. Ent. Soc, 41: 1-35, pis. 1-3 (detailed morphology of both sexes), 

 pi. 6, fig. 33 (wing) ; 1933. 



