226 THE CANADIAN ENTOMOLOGIST 



Limnophila (Eulimnophila) imbecilla illinoiensis, subsp. n. 



Male. — Length 6 mm. ; wing 6-6.5 mm. 



Very similar to typical -imbecilla Osten Sacken but very much smaller 

 (in imbecilla, the wing of the male measures 8.2-8.5 mm.). Head yellowish 

 with scarcely any gray pruinosity. Wings grayish yellow. 



Habitat: — Illinois. 



Holotype. — cT, Homer Park, June IH, 1020 (Prison). 



Paratopotypes. — Two cf 's. 



Type in the collection of the Illinois State Natural History Survey. 



Paratypes in the collection of Mr. Prison and the writer. 



Tipula tennessa, sp. n. 



Allied to T. ultima Alexander; wings brownish yellow, the dusky spot at 

 the end of the vein ^nd A small; abdominal tergites with a narrow, dark brown 

 median line; male hypopygium with the ninth tergite small, the caudal margin 

 with a broad, U-shaped median notch, the lateral lobes obtusely rounded with 

 the margins smooth, on the ventral face with a sharp chitinized spine. 



Male. — Length about 16.5 mm.; wing 18.5 mm. 



Generally similar to Tipula ultima, differing as follows: 



Antennae with the basal flagellar segments distinctly bicolorous, the basal 

 enlargement of each segment dark brown, the remainder of each segment paler 

 yellowish brown, the distal flagellar segments more uniformly brown. 



Coloration of the thorax identical in the two species. Wings with a deep, 

 brownish yellow suffusion, as in ultima, the dusky spot at the tip of vein -"^^nd A 

 very restricted but evident. Venation: cell R^ more acutely pointed at base; 

 cell Isi Mi long and narrow; petiole of cell Aly shorter than m. 



Abdominal tergites dull yellow with a distinct but narrow median vitta of 

 dark brown; lateral margins of the tergites less distinctly darkened; sternites 

 yellow. Male hypopygium with the sclerites fused into a continuous ring as 

 in uliima. Ninth tergite small, the caudal margin with a broad, U-shaped 

 median notch, the lateral lobes thus formed broadly and obtusely rounded, their 

 margins unarmed; on the ventral face of each of these lobes a conspicuous, 

 chitinized spine directed ventrad and slightly caudad and proximad; on the 

 middle line beneath a narrow chitinized ridge that is slightly bifid at the cephalic 

 end. Inner pleural appendage small, flattened, the distal end curved into a 

 spoon-shaped structure. Ninth sternite profoundly notched, at the base of the 

 incision with a flattened, recurved lobe that is sparsely provided with short 

 hairs; on either side of this rectangular lobe, a somewhat similar lobe whose 

 inner or proximal margin is provided with numerous, long, yellow bristles that 

 become more elongated near the distal end ; from the base of each of these 

 subtending lobes, a flattened digitiform lobe extends dorsad; from the region of 

 the pleurite a similar lobe is found, lying parallel to the last, the notch between 

 them very narrow. 



Habita.t. — Tennessee. 



Holotype.— d', Knoxville, May 17, 1915, (G. M. Bentley). 



Type in the collection of the Department of Entomology, University of 

 Tennessee. 



It will be seen from the above characterization that the hypopygium is very 



