HABITS OF THE EUROPEAN SPECIES. 75 
that the insect is primarily a tropical macropterous species, and that it 
has followed the coast from South America along the Gulf and Atlantic 
northward to Cape Breton, and along the Pacific coast to San Fran- 
cisco and possibly beyond ; also that it spread from northern Mexico 
and Texas northward as far as Winnipeg, subsisting upon the native 
grasses, and in the meantime spreading also to the eastward to northern 
Indiana and Ohio, and that during this time, by force of circumstances, 
it has again become fully winged and all trace of its former apterous 
condition, if such exists, has disappeared. 
On the other hand, from the Atlantic coast there has originated a 
tide of diffusion the trend of which has been westward, the species 
here partaking more of the nature of their seashore ancestry, and are 
more or less of the short-winged form, which their less nomadic habit 
has served to further emphasize. This tide of diffusion has encountered 
what the western tide did not, at least until much later, namely, the 
timothy meadows of the Caucasian agriculturist, and, adapting itselt 
to this food plant, has held closely to it, thus avoiding the necessity of 
seasonal migration; and that in northeastern Ohio and possibly in 
northern Indiana it has met the east-bound tide of diffusion, and is 
perhaps amalgamating with it. (See map, fig. 17, illustrating supposed 
direction of diffusion of chinch bug.) 
Although not at all conclusive evidence, I might add that the single 
specimen taken at Winnipeg by Dr. Fletcher was of the macropterous 
form, while the single example taken by Mr. Van Duzee at Muskoka, 
Canada, was of the brachypterous form; and this, with the fact that 
the specimens from the island of Granada were of the former and the 
Florida coast specimens of the latter exclusively, shows that latitude 
and climate have no effect. 
HABITS OF THE EUROPEAN SrECIES (Bl%98U8 dorUv FeiT.). 
Prompted apparently by a review of one of my papers read before 
the eight annual meeting of the Association of Economic Entomologists 
at Buffalo, in 1896, Prof. Karl Sajo, formerly of the Kg. Ung. Staat- 
liche Entomologische Yersuchsstation, at Budapest, published in the 
Illustr. Wochenschrift fur Entomologie, Vol. II, pp. 440-451, July IS. 
1897, a short paper on "Unser Blissus dorice? which is so fall of interest 
that I shall beg permission to present it here, together with figures of 
the larval, pupal, and adult stages of the insect (Figs. IS and 19). 
Professor Sajo writes as follows: 
In the article on the eighth annual meeting of the Association of Economic 
Entomologists (Xo. 26, pp. 401-403, Illustr. Wochenschrift fiir Entomologie), the very 
instructive observations of Mr. Webster on the "chinch bug" (IUissii* leueopHnu) 
in the State of Ohio were discussed. 
In view of this communication I will give more in detail that which 1 have 
observed concerning our European species of this genus, namely, Blistw dories Ferr. 
Like the North American larger species, the smaller European one appears in 
two forms, namely, the wingless and the winged. The first describe! oi this speoies, 
