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...uropteran Chrysopa, Haget (1953) on Leptinotarsa, and Krause (1953) on the grasshopper Tachycines. All these forms give evidence of a series of inductive interTHE

...for the validity of McClung's generahzation which was based on a study of grasshopper chromosomes.

...ious forms of grouse locut promises much in the cytological analysis since grasshopper chromosomes are among the most favorable for study. The saw flies have been

...is pomi) and Dampf, Hoffman & Varela have shown the same thing for various grasshopper's eggs. (See also Tchang and Andersen.) ...d for Bodine to show in 1929 that the water-content of the whole system in grasshopper and other orthopteran eggs rose during development. This process was eviden

...'16) is of interest. In tissue cultures of the testicular follicles of the grasshopper, Chorthippus curtipennis, the mitochondria were observed in the living germ

Disposition of pores in a grasshopper 407 Structures of pores in a grasshopper 415

...ode of origin have, however, been given by Calkins (earthworm) and Wilcox (grasshopper). The latter author asserts ('95) that in Caloptcnus the spireme of the fir

...said to be 16, and the same number is characteristic of the onion. In the grasshopper it is 12; in the hepatic Pallavicinia and some of the nematodes, 8 ; and in

Among insects, some (e.g. grasshopper, cricket, ant, etc.) produce young in the ordinary way, by the union of the

Among insects, some (e.g. grasshopper, cricket, ant, etc.) produce young in the ordinary way, by the union of the

grasshopper contains a considerable number of closed TESTIS OF A GRASSHOPPER. Xso. (After

It was just chance that Melanoplus femur rubrum was used, ince a grasshopper of that species was the first to jump into he collecting net. Photographs o LIVING SPERM CELLS OP GRASSHOPPER

...as the x-chromatin-element or nucleolus was, in the germ cell of the male grasshopper, a sex chromosome which carried factors involved in the determination of se

...oups of insects in which age and weight have been used are Bodine (’21) on grasshopper, Fink (’25) on potato beetle and other insects, Krogh (’14-’15) on Te The investigation of the germ-cell history in the grasshopper has entailed a general knowledge of its embryology, regarding which referen

...on the basis of conditions found in the Hemiptera, but in the case of the grasshopper the facts are as yet by no means clear. It was with the hope of clearing up plasmic elements in the grasshopper seem to be most difficult to preserve and stain satisfactorily. My observat

FITZGERALD, L. R. Development of enzymes in grasshopper egg and embryo. Melanoplus differentialis (Orthoptera) . Illb. 2c. c. D. M. K. KRAINSKA D. Development of enzymes in grasshopper egg and em- 1. 2a.

...ns of the cephalic extremity of the embryo a form resembling the head of a grasshopper. Marked maceration and dissociation were present throughout the entire body

...stine of mice. 2. Sporo zoa: a. Gregarina, several species in intestine of grasshopper and cricket. ...action of ordinary fixing agents. That the relatively stable cells of the grasshopper could be influenced bj' the almost instantaneous process . of killing did n

After the study of sections of quite a number of nerve cells from the grasshopper and cockroach, it is my opinion there is not much probability of any relati ...s no morphologic resemblance to the trophospongium which is present in the grasshopper and cockroach cells, although not so strongly developed in these insects as

...movements. The only animal in which this was not clearly the case was the grasshopper (Pachytylus). Through lack of inhibitory impulses the motions of the animal ...ion for the other three ; the wing movements for flying in the case of the grasshopper and the bee ; the reflex actions of swimming in the case of Hydrophilus, an