AMERICAN DIPTERA. 301 



after the escape of the insect. The pupa case of A. nionarha has a 

 much harder consistency, has two contiguous, short, subconical, pointed 

 projections at the top of the head, (exactly like the pupa of a A. saro- 

 t/tamni figured by Mr. Winncrtz 1. c. Tab. 1, f. 6.) The dorsal seg- 

 ments of the abdomen are covered in the middle with a number of 

 small points; the last segment, at the tip, has a crown of such points. 



As far as I know, six european Asphondf/lix are described ; most of 

 them develop in the buds of flowers, or produce galls. In the Mono- 

 (jraphs of N. A. Diptera, Vol. 1, p. 7, Mr. Loew made the suggestion 

 that '' Cec. grossulurise Fitch, ought, as it seems, to be referred to the 

 genus Asphondi/lid.''' ]Jut when he made this statement, he could 

 hardly have seen Dr. Fitch's description of the antennae of this species, 

 the joints of which are " separated by hyaline pedicels one third as 

 long as the joints, which are short cylindrical, with rounded ends, their 

 length scarcely more than double their breadth." It results from this 

 description that Cur. (jross7t/(tn't£ Fitch cannot be an Ai^phowJi/Ua^ and 

 that A. moiuirha is the first N. A. species hitherto described. 



But I possess in my collection an uudescribed species communicated 

 to me by Mr. Walsh some time ago under the name of Occid. helian- 

 thi (jlohidus Walsh in litt., which is an Asphondylia. The pupa has 

 the same coriaceous, hard consistency as that of A. monucha ; the dor- 

 sal segments of the abdomen of the pupa are likewise muricate and the 

 end of the abdomen has a crown of little spines j the two horny fron- 

 tal projections are likewise contiguous, only much smaller than those 

 of the pupa of A. monacha. 



It results from the foregoing that, as far as observed, the characters 

 of Asphondj/lia consist principally in the structure of the antennae 

 (cylindrical, elongated, sessile or nearly sessile joints, pubescent^ with- 

 out verticils; their number the same, or nearly the same in both sexes), 

 and in the elongated ovipositor of the female ; to which may be added 

 the structure of the pupa-case, which is of a rather tough cousibtency, 

 is muricate on the dorsal segments of the abdomen and has the frontal 

 pointed projections contiguous, and not remote as in many other Ceci- 

 domijidse. 



Trypeta polita, Loew. 

 I have been fortunate enough to trace the history of this pretty fly, 

 described and figured in the Monographs, etc. Vol. 1, page 77, Tab. II, 

 fi"-. 12. It produces galls, not unlike small Brussels sprouts in appear- 

 ance, caused by the arrest of the growth of the side branches of Soli- 

 dago aUksima. The accumulation of leaves produced by this stunting 



