No. G4] DIPl'ERA or COXXECTICUT: TAXOXOMT 219 



C. nubecula (O. 8.) 



1864. C'tenophora iKihcviiIa O.sten Sacken; Proc. Ent. Soc. Phila- 

 delphia, 3 : -15 - -IG. 



If this fly is distinct from apieafa, it will be separated best by 

 the winor-pattern, as described in key. It will probably be found to 

 be polychroic, as in apicafa. i. L. 13-15 mm.; w. 13-15 mm, 

 5. L. i\)-'2{) mm.: w. IG-IS nnn. 



(June) Que., Alass., N. Y., X. J., w. to 111., Tenn. and Mo. 

 Connecticut.— Rowayton, June 10, 1909 (C. W. J.). 



Ctenophora doi's^dis AValker (l<S-t8), described from Xewfound- 

 Jand, is a donbtfid species. 



Prionocera Loew 



1844. Pnouocera Loew; Stett. Ent. Zeitg'., 5:170. 

 1863. St;j(/cropis Loew; Berlin. Ent. Zeitschr., 7:298. 



A small aenus of essentially northern crane-flies. The common- 

 est local species, fusclpeiinis, is found in open marshes, where the 

 larvae live in the rich organic mud. 



Key to Species 



L Wings with the cells beyond cord darker brown than those in basal cells; 



obliterative areas along cord very conspicuous electa 



Cells of wing about equal in color on both sides of cord 2 



2. Wings with a strong fulvous suffusion; obliterative areas at cord restricted 

 to end of Rs and basal section of .l/i+j ; praescutum with a capillary dark 



brown median line fuscipennis 



Wings with a pale brownish to brownish subhyaline tinge ; pale areas at 



cord more extensive ; praescutum with a pale median line 3 



'\ Frontal prolongation of head dark dorsally, broadly yellow on sides... dimidiata 

 Frontal prolongation of head entirely brownish black sordida 



Prionocera dimidiata (Lw.) (Fi<r. 25. C). 



1S65. Sti/geropi.s d/midiata Loew: lierlin. Ent. Zeitschr., 9:129. 



Ashy-o-ray, opacpie, the praescutum v;ith four dark Gray stripes. 

 Abdominal tergites gray, narrowly dark brown medially, broadly 

 yellow laterally; caudal margins very narrowly bordered by pale. 

 ,:? . L. 12 - 13 min. : w. 13 - 14 mm. $ . L. 13 - 14 mm. ; w. 14 - 15 . 5 mm. 



(July) Alan., westw. and northwest w. to Alta. and Alaska. 



P. electa Alex. 



1927. Prionocera electa Alexander; Can. Ent., 59:188-189. 



General coloration gray; praescutum yellowish gray, with four 

 dark brown stri^jes; pleura blue-gray. Wings grayish Avhite, apical 

 cells strongly infumed; obliterative band before cord ver>' conspic- 

 uous. $. L. about 11.5 mm.; w. 13 mm. 



(July) Lab. — Arctic Canada. 



