BIOLOGIA CENTRALI-AMERICANA. } 



ZOOLOGIA. ! 



Class INSECTA. 



Order DIPTERA. 



Pam. CECIDOMYIDiE. 



ASPHONDYLIA. 



Asphondylia, Loew, Dipt. Beitr. iv. p. 21 (1850). 



A single species of this genus is the only member of the family Cecidomyidae as yet 

 described from within our borders. 



l. Asphondylia monacha. 



Asphondylia monacha, O. Sacken, Trans. Am. Ent. Soc. ii. p. 300 (1869), iii. p. 347 \ 

 Sab. North Ameeica, Brooklyn, L. I. 1 — Mexico, Northern Sonora (Morrison). 



A single specimen is in Mr. Morrison's collection. I used to breed this species from 

 galls of Solidago altissima in the State of New York. 



Fam. MYCETOPHILIDJE. 



SCIARA. 



Sciara, Meigen, in 111. Mag. f. Insektenk. ii. p. 263 (1803). 



l. Sciara americana. 



Sciara americana, Wiedem. Aussereur. zweifl. Ins. i. p. 68 ; Schiner, Reise d. Novara, Zool. iii. 

 Abth. i. p. 11. 



Sab. Guatemala, Zapote, Capetillo (Champion) ; Nicaeagua, Chontales (Belt) ; Costa 

 Eica, Irazu (Rogers). — Colombia ; Beazil. 



A dozen specimens from the above Central-American localities agree quite well with 

 Wiedemann's description as completed by Schiner, who may be right in supposing that 

 S. atra, Macq., S. cognata and S. prcecipua, Walk., all refer to the same species. 

 S. cognata, Walk., the type of which I examined in the British Museum, struck me as 

 the same. It seems to be a common species in Central and South America. 8. atra, 

 Bell., which I have compared, is identical with my 8. americana. Arribalzaga includes 



biol. cente.-amee., Dipt., July 1886. b 



