LIBRARY

HYMENOPTERA 647
greatly reduced venation with at most not more than five closed cells and without
stigma in the fore wings and an anal lobe in hind wings; ovipositor retractile
and coiled, issuing well before the extremity. The great majority of them produce
galls on oak trees, but the small families are parasitic on other insects.
LIST OF FAMILIES
37. Family CYNIPIDfE 41. Fan1ily EUCOILIDiE
38. .. FIGITIDlE 42. ASPICERIDfE
39. IBALIID...E 43. ANACHARITIDlE
40. CHARIPIDJE (ALLOTRIID...E)
KEY TO FAMILIES
(Modified from H. Hedicke, 1930)
1. Segment II of the hind tarsi with an outer styliform process; cubitus vein
arising between the middle and the base of the subcostal; abdomen
much compressed laterally; 7-16 mm. long. (Parasitic on wood
wasps.) . . . mALnDlE
Segment II of the hind tarsi without outer
process; cubitus often arising near the
middle of the subcostal or lacking;
abdomen globular or compressed laterally;
usually 1-3 mm. long, not exceeding
3 mm. (Gall-making and parasitic
species.) . 2
2. Scutellum with a cup-shaped, depressed,
or rarely only flattened prominence.
(Parasitic species.) . . EUCOILID..IE
AnJricus californicus
(Bassett)
Scutellum without such noticeable prom- FIG. 223. Wing of the California gallfly.
inence. . . .. '" 3
3. Second tergite narrow, tongue-like, and shorter than the third tergite.
(Parasitic species.)., . ASPICERIDlE
Second tergite neither narrow nor tongua-like and much longer than
the third tergite . . . . . . . . . . . 4
4. Second tergite shorter than half the width of the abdomen; cubitus
arising from the base of the subcostal or lacking . ., . 5
Second tergite at least half the width of the abdomen; if shorter, then
the cubitus arises from the middle of the basal vein . 6
5. Abdomen distinctly petiolate; second tergite longer than the third.
(Parasitic species.).. ...• . . ANACHARlTIDlE
Abdomen not distinctly petiolate, rather joined well upon the propodeum;
second tergite shorter than the third. (Secondary parasites
on aphids and coccids.) . . . . .. .' FIGITIDlE
6. Thorax: rarely sculptured; areolet absent where there is no apparent cell;
up to 6 mm. in length, rarely less than 2 rom. (Gallwasps, Gallfiies.)
CYNIPIDlE
Thorax smooth, flat, and shining, areolet of fore wing absent; at least
p.64,8
2 mm. or longer. (Secondary parasites of aphi.ds.) . CHARIPIDlE