204 DIPTERA OF NORTH AMERICA. 



C clirysopsidis Loew. % and J. (Tab. I, figs. 2 and 3.) — Rufa, 

 thorace fuscano, antennarum in mare artioulis 17, in fcemina 15 ; al<e 

 pilosse, cinereae, venula transversa nulla ; terebra foeminse longissirna. 



Red, thorax fuscous ; flagellum of the antennae 17-jointed in the male, 15- 

 jointed in the female ; wings hairy, cinereous ; no transverse veinlet ; 

 the borer of the female very long. Long. corp. % 0.1, $? 0.14. Long, 

 al. % and J 0.13. 



Red, ou the upper part of the thorax fuscous, with very short 

 hairs. Pleurae with brown spots. Abdomen with indistinct brown 

 bands. The hairs of the abdomen very short, appearing light- 

 colored. Antennas of .the male with seventeen (the right-baud side 

 antenna of one specimen with eighteen) joints of the flagellum; 

 joints on moderately long peduncles ; the two last are usually 

 welded together ; the verticillate hairs on them are very long and 

 rather light. The female generally has two flagellar joints less, 

 and they are rounder, with shorter hairs and without any pedun- 

 cle. Legs dark fuscous, in some directions with a bright sericeous 

 reflection ; tips of the knees whitish. Poisers very pale, with the 

 knob almost whitish. Wings rather dark gray on account of their 

 close pubescence; between the first and second longitudinal veins 

 no transverse vein is apparent ; the second longitudinal vein, 

 towards its end, is very little arcuated exteriorly. The anterior 

 branch of the third longitudinal vein is rather indistinct." (De- 

 scription drawn from dry specimens.) 



30. C. impatientis, n. sp. Succulent swelling at the base of the 

 flower of Impatiem fulva, in September; contains red larvae. 

 (Communicated to me by Prof. Schaeffer.) 



31. C. farinosa, n. sp. Rounded woody swelling at the base of 

 the leaflets or ou the midrib of the common blackberry; contains 

 red larvae. 



32. O. agrostis, n. sp. Mentioned in Dr. Fitch's paper : The 

 Hessian Fly, etc. (Trans. N. Y. State Agric. Soc, Vol. VI), on 

 p. 38 of the second edition, in pamphlet form, in a note which I 

 reproduce here: " I doubt whether the Hessian fly will continue 

 to be the sole member of this genus having a coarctate pupa. 

 Quite recently a species has occurred to my notice analogous to 

 the Hessian fly flaxseed in every point that I have been able to 

 detect, except that its larva-case is of a pale brown color, untinged 

 with rufous or castaneous. It infests the Agrostis lateriflora? num- 

 bers dwelling together in an imbricated gall, somewhat resembling 



