Entomology of the Illinois River. 197 



Last segment with tubercles or four short thick 

 teeth about the stigmata ; smooth, often shining, 

 transparent white or yellowish. {Limnohilni.) 



Hhipidia^ ? Geranomyia fDicranomyla. 

 Last segment [Fig. 30] with a lower and upper pair 

 of fleshy teeth about the stigmata, the median 

 one above wanting or much smaller than those 

 of the upper pair; or the segment rounded off 

 and entirely without teeth ; teeth often bearing 

 long hair; dirty yellowish or brownish, usually 

 roughened or \)Vihe^(iei\t....Limnophila, Gonomyia. 

 Mandibles thick, toothed, maxillary palpi short, antennae 

 longer and distinct; last segment [Fig. 33, 36, 37, 

 39] stellate, with radiating teeth, usually six or 

 more, about the two round stigmatal plates; pro- 

 thorax without false feet. {TipulinoB.) Tlpula. 



Subfamily Limnobhn^. 



Erioi'tera. 

 JE. graphica O.-S. 



This pretty little tipulid was taken twice upon the 

 cabin-boat at Station C, flying about a lantern, and 

 the larva is very likely similar in habits to Symplecta. 

 The dates were May 3 and 5, and we have found the 

 imagos also in Champaign county May 28, July 2, Aug. 

 5-17, and Sept. 14. According to Beling, the Erioptera 

 larvae live mostly in wet or moist earth. 

 Erioptera? sp. («). [Fig. 23-25.] 



An interesting larva was found this spring (1895) in 

 Flag Lake, where floating rushes had collected by drifting 

 against standing stems. On pressing down and submerg- 

 ing the floating mass, these larvae were seen struggling in 

 the water, conspicuous by their very dark colors. Their 

 structure evidently locates them near this genus. They 

 were found April 11 and 13. They are very active 

 swimmers, and as restless as a tabanid larva. Their 

 development in the direction of abdominal prolegs, 

 jointed anal appendages, and double prothorax shows a 



