> 
1897.] Entomology. 633 
notes and drawing. Untrained, inert, helpless, tortured, his patient en- 
thusiastic devotion to his studies, has enabled him to add something to 
our knowledge of os things and to gu for himself happiness in the 
midst of affliction.” 
The description of the new spider is given in the same number and 
the substance of part of the author’s notes in the species. Probably 
no species of insect has ever been described with such copious notes as 
to its life history and habits as in this case. 
Hemiptera.—Mr. B. M. Duggar* has made a study of a bacterial 
disease of the Squash bug (Anasa tristis), and publishes a series of 
experiments on the inoculation of other insects with the culture. 
The toxic properties of the bacillus were very marked. From one 
of the early isolation cultures several colonies of the disease bacteria 
were removed, “ and diffused in a small quantity of distilled water to . 
serve some inoculation purposes. On immersing young squash bugs 
in this solution death followed almost instantly. 
With nymphs somewhat older the effect was not so rapid but the 
bugs soon suecumbed. Young chinch bugs, flies and other insects stiff- 
ened as if dead on being immersed from one to several minutes. Many 
of the hard shelled insects if removed immediately on becoming rigid 
recover in a few minutes sufficiently to crawl away; but even these 
die if immersed in the solution for a longer time.” 
Messrs. Herbert Osborn and E. D. Ballt have published the results 
of a study of the life histories of the grass feeding Jasside. The more 
general results of their investigations show that so far as known all 
species deposit eggs upon the stem under the leaf sheaths of the plants 
used as food, and that the species have as a rule decided limitation as 
to food plant, but that the adults are more general feeders. Some of 
the species have but one brood, others two and still others three in a 
season and the ordinary life of a brood does not exceed two months. 
Some twenty-four species are noted as injurious to grass, several of which 
are undescribed. Technical descriptions of hitherto undescribed forms 
will appear in a forth-coming paper in the Proceedings of the Iowa 
Academy of Natural Sciences. 
Mr. J. B. Smith® has made notes on the life history of the harlequin 
cabbage bug and melon plant louse (Margantia histrionica and Aphis 
gossypii) with preventive and remedial measures. 
* Bull. Ill. State Lab. of Nat. se IV, 340-379. 
*Bull. 34, Iowa Agri. Expt. 
* New Jersey, Agri. Exp. Sta., “Ball, 121. 
44 
