Tue Hymenoptera oF MINNESOTA 189 
SIGNIPHORIDAE 
Antennae 6-jointed; marginal vein about as long as subcostal vein. Second pair 
of legs long, saltatorial with a very long tibial spur. Vronotum small, frequently not 
visible in the middle. 
Signiphora flavopalliata Ashm. is parasitic on Lepidosaphes becku; 
and S. occidentalis How. has been reared from the red scale. 
EUPELMIDAE 
Pronotum small, frequently not visible in the middle. Second pair of legs as in 
the two preceding families. Antennae 13-jointed ; occipital margin of vertex rounded. 
Eupelmus allyni French is an important parasite of Mayetiola 
destructor; E. reduvii How. has for its host the common squash bug. 
Eupelmus coleopterophagus Gir. has been reared, in Minnesota, from 
the strawberry weevil by S. Marcovitch (16th Rep. State Ent. Minn. 
1916). The female of Eupelmus mirabilis, a species bred by C. V. 
Riley from the eggs of the angular-winged katydid, and from the 
eggs of a large sphinx moth, is able to roll itself up into a more or less 
compact ball. See Riley’s excellent illustration, Fig. 48, p. 162, 6th 
Mo. Report where he refers to the species under the name of Anti- 
gaster mirabilis, as “The back-rolling wonder.” 
CALLIMOMIDAE 
Thorax not strongly developed, pronotum large; antennae many jointed, elbowed; 
body metallic, sides of scutel curved, abdomen frequently compressed; if without an 
extended ovipositor, the abdomen is conical or conic-ovate; ovipositor far anterior 
to tip of abdomen. Fore tibiae armed with a large curved spur, 
Specimens of the Genus Ornyrus have been bred from cynipid 
galls and from [Rhodites. Diomorus gabriskei Cress. is parasitic in 
nests of Ceratina dupla. Oligosthenus stigma F. has been reared from 
Rhodites rosae and Syntemaspis druparum Boh. from apple seeds. 
Megastigmus nigrovariegastus Ashm. has been bred from seeds of 
Rosa rugosa. 
EURYTOMIDAE 
Mandibles not strong, mostly 4-dentate at apex. Thorax as in preceding family. 
Antennae many jointed, with ring joints, rarely without; scape large and rather 
long; body not metallic; sides of scutel almost straight; anterior tibial spur large 
and strong, middle tibial spur small and weak, hind tibiae with two apical spurs. 
Ovipositor far in advance of tip of the abdomen. 
Members of this family are markedly parasitic. Species have been 
reared from the eggs of tree cricket, from the fruit bark beetle, and 
many other forms. There are, however, in the group, a few species 
