1 6 BIBIONIDAE. 



thoracicus Say, J. Acad. Phil. Ill, 80, 3; Wiedemann, Auss. Zw. I, 



77, 5. Pennsylvania, Maryland. 

 *tibialis Loew, Centur. IX, 61. -- Sitka. 



macnlatus Bellardi, Saggio etc. I, 19; tab. I, f. 5. Mexico. 



niin n 1 us Bellardi, Saggio etc. App. 7. - - Mexico. 



stygius Say, J. Acad. Phil. VI, 155; Compl.Wr. II, 352. Mexico. 



Observation. Mr. Walker's species. 



fulviooxa Walker, List, etc. I, 117. Ends. B. Terr. 

 serraticollis Walker, List, etc. 1, c. Huds. B. Terr. 



Hesperinns. 



Walker, List, etc. I, 81, 1848; Spodius Loew, Berl. Ent. Z. II, 101; 



Tab. I, f. 1-15; 1858. (). 



*brevifrons Walker, List, etc. I, 81. -- British Possessions; White 

 Mts., N. H. and Colorado Mts., in the alpine region. 



Plecia. 



Wiedemann, Auss. Zw. I, 72; 1828. ( 14 ). 



ruflcollis Fabricius, Wiedemann, Auss. Zw. I, 72 ; Macquart, Hist. Nat. 



Dipt, Atlas, Tab. IV f. 17; Bellardi, Saggio etc, I, 15. -- South 



America; Mexico; Florida. (Lake Harney, by Messrs. Hubbard 



and Schwarz.) 

 *lieteroptera Say, J. Acad. Phil. Ill, 77, 2; Compl. Wr. II, 69 (Bibio); 



Wiedemann, Auss. Zw. I, 80, 6 (id.) Atlantic States. 

 Penthetria aim Macquart, Hist. Nat. Dipt. I, 175, 2. Compare also 



Van der Wulp, Tijdschr. etc. 2<i Ser. IV, 81. 

 Eupeitenus ater Macquart, Dipt. Exot. I, 1, 85; Tab. XII, f. 3. 



Philadelphia. 

 Plecia longipes Loew, Berl. Ent. Z. II, 109. - - New Orleans. 



bicolor Bellardi, Saggio etc. I, 16. -- Mexico. 



lieros Say, J Acad. Phil. VI, 154 (Penthetria) ; Compl. Wr. II, 352 



(id.) Mexico. 



nigerrima Bellardi, Saggio etc. I, 14. - - Mexico. 

 rostrata Bellardi, Saggio etc. I, 15. - - Mexico. 

 rufithorax Walker, List, etc. I, 116. - - Jamaica. 

 vit tat a Bellardi, Saggio etc. App. 7, f. 4. Mexico. 



Observation. Plecia bimacidata Walker, Dipt. Saund. 422, 

 United States, is the female of one of the common North- American 

 Dilophus. 



Scatopse. 



Geoffroy, Hist. Nat. d. Ins. II, 545; 1764. ( 1S ). 



*atrata Say, Long's Exp. App. 367; Compl Wr. I, 250; Wiedemann, 



Auss. Zw. I, 71, 1. Philadelphia. 



Scatopse recurva Loew, Linn. Entom. I, 350, Tab. Ill, f. 4. - 

 Europe. (Loew. Sillim. Journ. N. Ser. Vol. XXXVII, 317.) 



