148 Journal New York Entomological Society, t^^'oi- ^^x. 



placed in the genus Euparyphns. It is also quite possible that the 

 unreared larva described by Haliday (1857) and doubtfully identi- 

 fied as Oxycera morrisii belongs to tcnnicornis instead. 



Though the genus Ncmotelns occurs in the eastern states, the 

 larvae of our species have not been described. Figure 18 represents 

 the larva of the European A^ panthcrinns, which, according to Lund- 

 beck, lives in water among plants. It hibernates as a larva and 

 transforms the following spring or summer. Haliday (1857) states 

 that the larvae of N. nliginosiis are common under dried-up algae and 

 other vegetable matter strewn on the ground especially in marshy 

 spots on the shore. In all probability, however, it is only at time 

 of pupation that they tolerate a dry situation. 



Neither have the early stages of the North American representa- 

 tives of the genus Oxycera been described. Heeger (1856) figured 

 and described the larvae of two European species O. Mcigenii and 

 O. trilincata. The larvae of O. Meigenii live in small brooks con- 

 cealed in the ooze, coming to the surface in warm weather. 

 In captivity they feed readily on roots of plants, bread crumbs, and 

 dead earthworms. In the spring they creep into dry situations under 

 stones and the like, to pupate. The full-grown larva measures 12 

 to 14 mm. in length. The flies emerge in July, laying their eggs 

 soon after. The oval eggs measure 0.5 x 1.5 mm. Heeger's figure 

 of O. trilincata is reproduced in figure 21. The larva of this species 

 when full grown measures about 10 mm. in length. In habits it 

 resembles the foregoing. Lundbeck, who also describes it, states 

 that the larva lives in mud, and that the development of the imago 

 takes place in spring or summer. The life histories of the oth-er 

 species of this subfamily represented in the fauna under consideration 

 are unknown. These are Akronia frontosa Hine, recorded from 

 Ohio, ClitcUaria siibiilata Loew from Virginia, and Scoliopclta lu- 

 tcipcs Will, from New Hampshire. 



Since the foregoing paragraphs were written I have seen a specimen 

 of each of the genera Nemotelus and Oxycera, both taken from frog 

 stomachs. These species differ only in specific characters from the 

 European forms given in the keys. My specimen of NcmotcIus has 

 the posterior margin of the last abdominal segment slightly emarginate 

 instead of notched. 



