DIXIDAE. — EHYPHIDAE. 41 



a different structure etc. One or two other species, as yet im- 

 described, occur in the United States, which are still more like 

 the European D. sylvicola, although they also have a discal cell. 



Ctcnopliora. (**). 



Meigen, Illiger's ^lagaz. II, 2(33; 1803. 



*ai)icata 0. Sacken, Proc. Ent. Soc. Phil. 1864,46. — New Hampshire. 



dorsalis Walker, List, etc. I, 76. — Newfoundland. 

 ^frontalis 0. Sacken, Proc. Ent. Soc. Phil. 1864, 48. — Massachusetts. 

 (?) Cienopliora succedcns Walker, Dipt. Saund., 448. — Canada. 



* fnmipeiniis 0. Sacken, Proc. Ent. Soc. Phil. 1864, 47. — Virginia. 



* nubecula 0. Sacken, Proc. Ent. Soc. Phil 1864, 45. — Illinois. 

 *topaziua 0. Sacken, Proc. Ent. Soc. Phil. 1864, 47. — Virginia. 

 *aug-ustipennis Loew, Centur. X, 3; 0. Sacken, Western Diptera, 211. — 



California (among the redwoods in the Coast-Range, not rare). 



Observation. For Ftilogyna fidiginosa Macquart, see the 

 note. {'% 



FAMILY DIXIDAE. 



l>ixa. 



Meigen, Syst. Beschr. I, 216; 1818. 



* centralis Loew, Centur. Ill, 3. — New York. 



(?) Dixa nova Walker, List, etc. I, 85. — New York Factory. 

 *claYata Loew, Centur. VIII, 1. — Massachusetts. 

 *fusca Loew, Centiur. Ill, 5. -— New l^ork. 

 *niarginata Loew, Centur. Ill, 1. — Distr. Columbia. 

 *notata Loew, Centur. III. 4. — Maryland. 

 *terua Loew, Centur. Ill, 2. — New York. 



(?) JDixa recens AValker, List, etc. I, 85. — New York Factory. 

 *venosa Loew, Centur. X, 1. — Texas. 



Observation. About an undescribed Dixa from California, 

 compare 0. Sacken, Western Diptera, 196. 



FAMILY RHYPHIDAE. 



Rliypliiis. 



Latreille, Hist. Nat. etc. XIV, 291; 1804. 



*alternatus Say, J. Acad. Phil. Ill, 27, 2; Compl. Wr. II, 51; Wiede- 

 mann, Auss. Zw. I, 82, 1. — Atlantic States. 



*fenestralis Scopoli; Meigen, Syst. Beschr. I, 323. — Europe and 

 North America (Loew, Sillim. Journ 1, c). 



*l)unctatus Meigen, etc. — Europe and North America (Loew, Sillim. 

 Journ. 1. c). 

 B]iii}>hiis marginatus Say, J. Acad. Phil. Ill, 27, 1 ; Compl. Wr. II, 50; 

 Wiedem. Auss. Zw. 1, 82, 2 (Loew, Sillim. Journ. N. Ser. XXX.VII, 317). 



