Appendix B 
EX CEIUNEOGUI, Ole Wale “IMaerOrTID” GALLS OF 
NORTH AMERICA 
BY 
GEORGE H. CHADWICK, ZOOLOGIST 
Since Dr Hagen published his list in 1885 [The Collection of 
Phytoptocecidia, or Mite Galls, in the Cambridge Museum. Can. 
Ent. 17:21], no general check list of our mite galls has been issued. 
Cook in 1904 [Ind. Dep't Geol. 29th An. Rep’t, p. 801] published 
on the galls of Indiana, and Jarvis has recently [ Ent. Soc. Ont. 
37th & 38th An. Rep’t, p. 56 and 92 respectively | listed the Canadian 
forms, while Garman in 1892 [American Phytoptocecidii. Psyche, 
6:241] described those known to him. Garman’s careful paper 
Oi Insts IU, SuateSs lett, maa INepit, oD, wae], worsorer, WaS mot 
seen by Hagen, and all of these papers with other scattering articles 
contain additions to Hagen’s list. Besides these, about 20 unmen- 
tioned forms are known to the writer, bringing the total number of 
American forms up to more than double what Hagen recorded. It 
has seemed worth while, in view of the interest which must soon 
center in this rather neglected family of mites, to put this list in 
print as a guide and check for future work, though in so doing 
its imperfections and temporary character are painfully evident. 
Difficulty has been met in correlating various writers, as descrip- 
tions from dry or preserved and from fresh specimens often differ 
greatly. In a few cases recent writers appear to have misapplied 
the names or descriptions of earlier authors, thus introducing con- 
fusion. 
The present list is arranged alphabetically by host plants, using 
Britton and Brown’s nomenclature. For convenience certain com- 
mon types of leaf-galls will be referred to as follows: 
By pe ori SE Erineum 
esac tlal nctee ae a LIS ee Dimple 
os yebalelslies eng ee ES 4 Capsule 
Pocket (Cephaloneon 
ri ipaeea LIN eke ea cte ——@5 Nese Pea ds 
5S VE ere: a= ee eoncn of Hagen) 
118: 
