38« NEW YORK STATE MUSEUM 



d Palpi biarticulate 



e Abdomen dark reddish brown; the 2d palpal segment not 

 3 times the length of the ist; ventral plate long, broad, 

 roundly and slightly emarginate, male; bred from 



truncate gall on Amelanchier 



canadensis n. sp., ai758 



ee Abdomen dark reddish; the 2d palpal segment 3 times 



the length of the ist, female; bred from a terminal 



bud gall on Spiraea clarkei n. sp., aiysga 



dd Palpi triarticulate 



e Abdomen shiny black; ventral plate spatulate, truncate 



dorsally, male j o h n s n i Felt, C. 821 



ee Abdomen dark red; ventral plate short, broad, broadly 

 emarginate, male ; bred from cockscomb gall on Cra- 

 taegus leaves crataegifolia Felt, ai362 



aa Wings broad, broadly rounded posteriorly, the vi^idth about ^3 the length 

 [pi. S7, fig. 5]. Palpi tri or quadriarticulate 

 b Palpi triarticulate 



c Abdomen dark salmon or deep red ; 5th antennal segment with a 

 broad, smooth area and slightly constricted near the basal 3d; 

 3 circumfili, the loops heavy, rather short, broad ; ventral plate 

 roundly emarginate, male; bred from tubular gall on oak leaves 

 (C ec i d omy i a) t ubi c o 1 a O. S., C. 1106, 31450 

 cc Abdomen light yellowish; 5th antennal segment cylindric, taper- 

 ing at both extremities, with 3 circumfili, the loops heavy, 

 rather short', broad, male ; bred from melon-shaped, with de- 

 pressed center, hickory leaf gall, .thompsoni n. sp., C. Iii6a 

 bb palpi quadriarticulate 



c Abdomen fuscous or deep carmine; Sth antennal segment having 

 the basal stem with a length j4 its diameter, the distal stem 

 with a length J/2 its diameter, the basal enlargement slightly 

 produced, with a length twice its diameter and tapering at 

 both extremities ; circumfili indistinct, short, the loops with a 

 length about equal to the distance separating their insertions; 



dorsal plate broadly and roundly emarginate 



(Ceci d o my i a) ca r y a e O. S., C. Ii04y 

 cc Abdomen orange or deep carmine; sth antennal segment with the 

 basal portion of tlie stem hardly apparent', the distal part very 

 short, the basal enlargement subcylindric, with a length about 

 ^ its diameter, the distal enlargement cylindric, with a length 

 3^2 greater than its diameter; circumfili heavy, the loops thick, 

 the basal loops reaching to the insertion of the 2d circumfilum, 

 the loops of the distal circumfilum to the base of the following 

 segment; dorsal plate nearly truncate, very slightly and broadly 

 emarginate; bred from smooth subglobular, nippled gall on 

 hickory a r c u a r i a n. sp., C. 1 1042 



