3790 NEW YORK STATE MUSEUM 
cc 2d to 4th segments of the posterior tarsi greatly enlarged; abdo- 
men pale yellowish, greenish dorsally; 3d vein uniting with. | 
costa just beyond the apex; antennae dark brown, the 5th seg- 
ment with a stem % the length of the basal enlargement ; male 
| ewe al) aS aah, Say CE, Sih 
bbbb 15 antennal segments 
c¢ Abdomen dark reddish; antennae dark reddish brown, the 5th seg- 
ment with a stem 1% the length of the basal enlargemient; male 
(Oligottophws)) tsmeae Pele 165m 
aa 16 to 19 antennal segments 
b 16 antennal segments 
c Antennal segments sessile, the 5th with a length 2% times its 
diameter; ovipositor % the.length of the abdomen 
d Abdomen reddish brown, the body slender, the lobes of the 
ovipositor with a length twice their width; bred from 
Slenderawallowstwigsse temaleie met eres were 
Caulicolacniisp, Crargoza 
dd Abdomen dark brown, the body stout, the lobes of the ovi- 
positor with a length 3% times their width; bred from sub- - 
globose, galls-on’ slender wallow, twigs... 952.6 ss. os oe ce oe 
Pall mm idiO; Seavey 114/Sp'. Cx 1300 
cc Antennal segments with more or less of a stem 
d The 5th antennal segment with a stem ™% the length of the 
basal enlargement, which latter has a length twice its 
diameter; abdomen yellowish brown; 3d and 4th palpal seg- 
MENES eGUal sea DiReds mit Oilusiertul)perSietGin al Ch immrtsee meray 
: Ce @sr mt CEy is Sor, Ca Oxo) 
dd 5th antennal segment with a stem 1% the length of the basal 
enlargement; abdomen dark brown; bred from slender wil- 
lows twicse. Malena eee: GE iCouls, wk Gory, (G, eins) 
ddd 5th antennal segment with a stem % the length of the basal 
enlargement; abdomen yellowish brown; bred from 
Reibiess maleic mae Gali fon wiGasnssp, acs O10 
dddd 5th antennal segment with a stem % longer than the basal 
enlargement; abdomen fuscous; bred from elm buds and 
folded sleaviesman Shit maw ee ulmi Beutm., C. 1239, a1683 
bb 17 antennal segments 
c 5th antennal segment with a stem 3 the length of the basal en- 
largement; abdomen dark brown; bred from willow; male..... 
americana n. sp. C. 920 
bbb 18 antennal segments ‘ . 
c 5th antennal segment with a stem 34 the length of the basal en- 
largement 
d Abdomen reddish brown; bred from wheat stems; male..... 
(CCeCidG my ca) Ces trine wo we Senn, Cs Wy V7 
bbbb 19 antennal segments 
c Abdomen reddish brown; 5th antennal segment with a length 3 
times its diameter; ovipositor 14 the length of the abdomen, the 
lobe with a length twice its width; bred from wheat stems; 
females seuss (Gecidomyuaedestriuc tomeSay Ost 
