1836. ] Zoblogy. . 559 
ment of Agriculture, has had the matter investigated and it appears 
that the young locusts, which are now all hatched, turn out to be 
one of the larger wide-spread species, viz., the differential locust 
(Caloptenus diffirentiahs). This species has at times been very 
abundant in Illinois and in other States but, according to its past 
history, there is no danger of its ever becoming so serious a pest - 
as the Rocky Mountain locust, and hence Professor Riley believes 
there is no occasion for alarm 
. 
ExnTOomorocicaL News.—At a recent meeting of the London En- 
i tomological Society, the venerable Professor Westwood remarked 
that an insect (Macherota ensifera Burm.) in Ceylon, allied to the 
| frog-hopper (Aphrophora), instead of being enclosed in a liquid — 
(cuckoo-spittle), formed a case by the rapid hardening of the 
liquid secreted. Dr. Geo. Marx, artist of the Agricultural De- 
partment, publishes in Axtomologia Americana for May, a descrip- 
tion of the male of Gasteracantha rufospinosa from Florida, with 
excellent figures of the two sexes. Although 170 species of this 
genius are known, the males of only two species have been 
À hitherto discovered. The male differs much in shape, besides 
being less than one-quarter as large as the female. In Bulletin 
No. 5 of the Cal. Acad. Sciences, T. L. Casey revises the Califor- 
nia species of Lithocharis and allied genera of Staphylinidæ. 
The Transactions of the American Entomological Society, XII, 
ZOOLOGY. 
b. SELF-Division 1x Septic Monaps.—In Dr. Dallinger’s annual 
4 “tess before the Royal Microscopical Society, Feb. 10, he de- 
tailed the results, which are published in full in the journal of the ` 
oy for April. Four forms were selected for study. In each z 
Of the four organisms the facts were discoverable in the develop- 
e Pig of the nucleus, the origin of the flagella and the growth of 
z ey. They were best seen in Tetramitus rostratus and Poly- 
a uvella ; not quite so well in Dallingeria drysdal, and least 
oy in Heteromita rostrata; but in all they were seen with 
fficient clearness to leave no doubt. Each of these septic or- 
| cally Siaa a long series of fissions with is practi- 
: divided forms fuse into one, become quite still, and at length — 
