INSECTA. '471 
n.3 long as ponuUimato. Other characters as in Synophrusy but apparent 2nd 
abd. segment divided by an indistinct suture. 
Synerges (1. c. p. 480). Ant. cJ 15-jointed, $ 14-jointed or 13-jointed, 
with last joint long. Thorax transversely rugose ; scutellum rugose. Pleura 
scarcely glabrous. Abdominal peduncle constricted in the middle, composed 
of two parts, the first a short cylinder, the second larger and conical, with 
the small end behind. Second abdominal segment forming nearly or quite 
the whole abdomen. 
The arrangement of the genera of Cynipid(B (sens. lat.),‘ ac- 
cording to Walsh, is as follows (/, c. p. 480, note) : — 
Fam. Cynipid^. 
Subfam. Psenides. 
Genera: Cynips, TAnn. {—Diphlcpis, Callaspidia, Fitch me 
Dahlb.) ; Biorhizay Westw. ; Philonix, Fitch ; Diastrophus, Hart. ; RhoditeSy 
Hart. ; IbaUa, Lat. ; Tribaliay Walsh, n. g. 
Subfam. Inquieinje. 
Genera : Synophrus, Hart. ; Synergesy Hart, j AmUynotuSy Hart, j »Shro- 
thrns, Reinh. ; AvlaXy Hart. 
Fam. Figitid^. 
Genera : FigiteSy Lat. ; Onychia (?), Hal. ; Callaspidia (?), Dahlb. ; 
Allotria (?), Westw. ; Kleidotoma (?), Westw. ; Eucoila (?), Westw. ; JEgilips 
(?), Hal. 
Walsh {1. c. pp. 481-494) furnishes a list of the Cynipidae in- 
habiting various species of oaks in the State of Illinois, with 
descriptions of their galls, and of several new species : — 
t Galls upon Jjeaves. 
1. Black Oak (Q. tinctoria). C. q. spongijica, 0. S., ahtumnal form Cl 
q. aciculata, O. S.= C. cotijluensy Harris, 1862= C. conJlumtAiSy Harris, 1841. 
Guest Gall-fly, Synophrus Iceviventrisy O. S. 
2. Red Oak ( Q. rtihra). C. q. inanhy 0. S. = Callaspidia conjlumtay Fitch. 
3. Black Oak. Gall of C. q. pilulce j Gall-fly unknown ,• Guest Gall-fly 
Amhlynotus inermisy n. sp. 
4. White Oak ? Gall of C. q.jlocciy probably indentical with q. lanay 
Fitch. C. q.jlocciy n. sp. Guest Gall-fly Synophrus albipesy n. sp. 
5. White Oak. Gall of C. q. erinacei = q. pisum, Fitch ? — pezomachoidesy 
O. S, ?). Gall-fly C. pezomachoideSy 0. S. ?. Guest Gall-fly C. q. pisuniy 
Fitch ? = Synophrus IcevivcntriSy 0. S. ? 
6. Red Oak. Gall of C. q. sculptay Bassett. 
7. Red Oak. Gall of C. nubilipennis, Harris (=C. q. Bassett). 
8. Swamp White Oak (Q. prinuSy var. discolor). Gall of C. q. petiolicolay 
Bassett. Guest Gall-fly Amhlynotus ensigery n. sp. ? 
9. Black Oak and Laurel Oak (Q. imbricaria). Gall of C. q.palus- 
trisy O. S. 
t t Galls on Limbs, Twigs, &c, 
10. White Oak. Gall of C. q.globulusy Fitch.j Guest Gall-fly Synerges 
oneratuSy Harris and Fitch. 
