CONNECTIVE TISSUE OF THE LOCUST. 
197 
cular system under this head had the time at my disposal permitted my 
investigating it. 
In the connective tissue we find, first, long fibres upon which sit small 
compressed and elongated nuclei (Fig. G con.), and which form a loose 
network ; second, the pale round cells, with a nucleus at the periphery 
(Leydig's zellig blasiges Gewebe' 263 ) : third, the fat-cells 204 (Fig. 15) ; and, 
fourth, the connective tissue with stout trabecular and small meshes 
around the ovary (Fig. 17). I shall here speak only of the third and 
fourth kinds of tissue. The " Fettkorper" of the Germans, or the fat- 
body, is generally, and I think correctly, supposed to be merely a mod- 
ification of the connective tissue. Fig. 15 is from a section cut from 
the object after it had been imbedded in paraffine, so that the action of 
turpentine on the cells, while the object was being prepared for imbed- 
ding, probably altered their appearance from what is natural by dis- 
solving a portion of the fat they originally contained. In a preparation 
of this kind, which has b een colored by hreinatoxiline, the outlines 
and nuclei of the cells appear very distinctly. The cells are nearly of 
uniform size, and so crowded together (Fig. 15) that their walls are flat- 
tened by mutual pressure. The nucleus is placed iu the center of the 
cell and is nearly or quite spherical, and especially characterized by 
containing some fifteen to twenty or more large granules of nearly uni- 
form size and darkly colored by the logwood, while the intervening 
spaces are quite pale and clear. The nature of the body of the cell is 
obscured by numerous indistinct lines and dots, the real nature of which 
I have been unable to make out. 
Graber has described some interesting peculiarities iu the fatbody of 
insects, especially in Pthirius. 265 He found the cells in this insect to be 
elongated, charged with greenish pigment, with spherical nuclei. Ono 
end of the cells is pointed and free, the other is united with a cord of 
connective tissue, the ultimate course of which he could not follow. 
Graber suggests that these cords contain trachea} running to terminate 
in the fat-cells themselves. Besides these Graber saw other fat-cells in 
which he discerned no nucleus. The presence of pigment in the fat- 
cells is very common. The pigment is usually green or yellow, but 
sometimes of other colors. 
As regards the connective meshes with stout trabecule around the 
follicles of the ovary, I believe that Fig. 17 illustrates its appearance in 
the locusts better than any description I could give. I will, therefore, 
only call attention to the rounded form of the openings and their un- 
equal size, and I have often seen them much larger than any in Fig. 17. 
Of this same ovarian tissue I have obtained very beautiful preparations 
from Anabrus (Fig. C2), showing both its fibrous character and the shape 
and form of its nuclei. The fibres are exceedingly fine, and show a tend- 
m3 Leydig Vom Bau dcs Thierischen Korper'a. Tubingen, 1804, p. 29. 
'"See particularly Leydig TJober den Fettkorper der Arthropoden, Miiller's Arch., 1803, p. 192. 
865 Graber Z. Z., xxii, p. 152-157. Taf. xi, fig. 7 b. 
