180 SEVENTEENTH Report STATE ENTOMOLOGIST OF MINNESOTA—1918 
This group offers a most interesting and inviting field for the 
student and collector and much remains to be learned regarding it. 
Galls should be collected early in the autumn, separated as to kind and 
enclosed in muslin bags. 
(Rhodites) Diplolepsis rosae L. occurs in the Lugger collection, 
with many other unnamed galls. We are indebted to Prof. O. W. 
Oestlund of the state University for the following list of Cynipid galls, 
collected in this state and now in the University collection. 
Biorhiza forticornis Walsh, Oak Fig Gall. Cass Lake, Sept. 10. 
Neuroterus batatus Bassett, Oak Potato Gall, Manitou Junction, Oct. 
15. Dryophanta lanata Gill, Excelsior, Oct. 1. Holcaspis globulus 
Fitch, Oak Bullet Gall, Minneapolis, Oct. 5. Cynips confluens Harr., 
Oak Apple, Burntside Lake, Aug. 17. Amphibolips inanis Osten 
Sacken, Empty Oak Gall, Duluth, Sept. 12. Andricus petiolicola Bas- 
sett, Oak Petiole Gall, Minneapolis. Andricus frondosus Bassett, Mani- 
tou Junction, Oct. 15. Andricus seminator Harr., Oak Seed Gall, 
Minneapolis. hodites bicolor Harr., Spiny Rose Gall, Minneapolis. 
Rhodites multispinosus Gill. Large Spiny Rose Gall, Cass Lake, Sept. 
10. Rhodites globulus Beutenmiller, Globular Rose Gall, Granite 
Paliss@ct- l"Cass ake: sept. 10: 
IBALIUD AT 
Same as Cynipidae, but basal joint of hind tarsi at least twice as long as second, 
third, fourth and fifth joints united. Second, third and fourth joints of tarsi longer 
than fifth; abdomen very distinctly compressed from side to side and distinctly longer 
than head and thorax united. 
This family represents a small group of parasites. W. H. Har- 
rington states that /balia maculipennis destroys the larvae of Tremex 
columba and Xiphydria albicornis. In the Riley collection is a sin- 
gle specimen of the above insect labelled “So. Ill. bred from Hickory 
wood June 4, 1875.” Probably, therefore the group attacks, gen- 
erally, members of the superfamily Siricoidea. 
CHALCIDOIDEA 
First abdominal segment not forming a scale or knot (petiole) and therefore not 
strongly differentiated from the remaining segments. Usually small insects, less than 
9 
3 millimeters in length and metallic. 
All species in this superfamily with few exceptions (Isosoma for 
example) are parasitic. The insects are small and noted for their bril- 
liant colors and striking forms. Dr. L. O. Howard of Washington, 
D. C., was the first entomologist in America to work on this group, 
and he and the late Mr. Ashmead applied themselves, practically 
