CATALOGUE OF NORTH AMERICAN DIPTERA. 163 



nodulus WALSH, Proc. Ent. Soc. Phil., in, 599 (salicis-noditlus). Rock Id., 111.; 



gall on Sali.r longifolia. 

 nucicola OSTEN SACKEN, Trans. Amer. Ent. Soc., in, 53. N. Y. ; in the husks of 



nuts of Hicoria. 

 ocellaris OSTEN SACKEN, Mon. N. A. Dipt., i, 199. D. C. ; larva in depression on 



under side of leaf of Acer rubntm. 



Note. Comstock, Rept. Dept. Agric., 1881-2, 20.2, pi. xvn, describes the 

 adult as a Sciara. But Mik, in Verh. Zool.-bot. Ges., 1883, 190-192, con- 

 siders this an error of rearing, the Sciara coming from the earth in the 

 breeding cage. The same view is held by Brauer, Zweifl. d. Kaiserl. Mus., 

 in, 46, and by Osten Sacken, 2d edit, of his Characters of Larvae of 

 Mycetophilidse, Heidelberg, 1886, postscript, p. 27. 



N. J. Smith Cat.; Mich. J. M. A. 

 pellex OSTEN SACKEN, Mon. N. A. Dipt., i, 199. D. C. ; galls on leaves of Frax- 



inus amcricana. N. J. Smith Cat. 

 persicoides OSTEN SACKEN, Mon. N. A. Dipt., i, 193; Cat., 216, note. D. C. ; on 



Hicoria. N. J. Smith Cat. 

 poculum OSTEN SACKEN, Mon. N. A. Dipt., i, 201 ; Cat, 216, note (probably in- 



quilinous in the gall of a Cynipid of Quercus}. D. C. 

 FITCH, 2d N. Y. Rept., No. 40, " Oak Spangles." 



N. J. Smith Cat. 

 pomum WALSH and RILEY, Amer. Ent., i, 106, f. 85, gall (vitis-pamum}. 111.; 



on Vitis cordifolia. 

 RILEY, 5th Mo. Rept., 114-116, figs, and notes. 



N. J. Smith Cat. 

 pudibunda OSTEN SACKEN, Mon. N. A. Dipt., i, 202. D. C. ; on leaves of Car- 



pinus caroliniana. 



racemicola OSTEN SACKEN, Mon. N. A. Dipt., i, 196. D. C. ; larvae among ra- 

 cemes of Solidago. 



rigidae OSTEN SACKEN, Mon. N. A. Dipt., i, 189, gall desc. and name changed. 

 FITCH, Amer. Quart. Jour. Agric. and Sci., i, 263 (salicis, preoc.). N. Y. ; 



makes a swelling at the tip of twig of Sali.v rigida and lucid a. 

 WALSH, Proc. Ent. Soc. Phil., in, 595, abstr. of Fitch. 



N. J. Smith Cat. 

 salicifoliae OSTEN SACKEN, Proc. Ent. Soc. Phil., vi, 220. Canada ; on Sfira-a 



solid folia. 

 salicum COCKERELL the gall so mentioned is that of a sawfly of the genus Pon- 



tania, with " little or no doubt " ; Ckll. in Hit. 

 sanguinolenta OSTEN SACKEN, Mon. N. A. Dipt., i, 192. D. C. ; on Hicoria. 



N. J. Smith Cat. 

 serotinae OSTEN SACKEN, Trans. Amer. Ent. Soc., in, 346. N. Y. ; on Primus 



scrotina. N. J. Smith Cat. 



symmetrica OSTEN SACKEN, Mon. N. A. Dipt., i, 200. D. C. ; on Quercus. 

 triticoides WALSH, Proc. Ent. Soc. Phil., in, 598; vi, 225 (salicis-triticoides}. 



Rock Id., 111. ; on Salix cordata. 

 tubicola OSTEN SACKEN, Mon. N. A. Dipt., i, 192; Cat., 216, note. D. C. ; on 



Hicoria. 



N. J. Smith Cat. 

 tulipif erae OSTEN SACKEN, Mon. N. A. Dipt., i, 202. D. C. ; on Liriodendron. 



N. J. Smith Cat. 

 umbellicola OSTEN SACKEN, Trans. Amer. Ent. Soc., in, 52 and 347.- N. Y. ; N. 



J. ; on Sambucus racemosa, among the umbels. 



