CHROMOSOMES OF TIGER BEETLES 465 
secondary spermatocytes, with ten (10) and twelve (10 + X + x) 
chromosomes, respectively. In the second division the com- 
ponents of the bipartite body separate, and both divide in this 
division with ten and twelve chromosomes. 
7. The germ cells of the female seemed to contain approxi- 
mately twice the amount of X chromatin as those of the male. 
This is in accordance with the fertilization formula considered 
in the text. The behavior of the chromatin of the growth 
period was followed through the leptotene, bouquet, and syn- 
izesis stages, to the breaking up of the late synaptic threads to 
form the faintly staining chromatin masses, characteristic of 
the prophase egg nucleus. 
8. A number of abnormal mitotic figures were observed of 
which the following are types: metaphase plates containing 
multiple chromosome numbers, abnormally large telophases, 
spindles being absorbed in the cytoplasm, dipolar spindles con- 
taining only one large chromatin elements, and spindles with 
three, four, and six poles. 
LITERATURE CITED 
Borpas, L. 1900 Rétherches sur les organes reproducteurs males des 
’ Coleoptéres. Ann. Sc. Nat. Zool., T. 11. 
Borine, Autic—e M. 1907 A study of the spermatogenesis of twenty-two species 
of the Membracidae, Jassidae, Cercopidae, and Fulgoridae, with 
special reference to the behavior of the odd-chromosome. Jour. 
Exp. Zool., vol. 4. 
Davis, H. 8. 1908 Spermatogenesis of Acrididae and Locustidae. Bull. 
Museum Comp. Zool., Harvard College, vol. 52. 
FERNANDEZ-NONIDEZ 1914 Blaps lusitanica. Trab. Mus. Nae. de C. Nat. 
de Madrid, Ser. Zool., No. 18. 
Gieiio-Tos, ErmManno -1908 Mitochondri nelle cellule seminali maschili di 
Pamphagus marmoratus. Biologica, vol. 2. 
GotpsmiTH, WituiAM M. 1916a Relation of the true nucleolus to the linin 
- network in the growth period of Psellidoes cinctus. Biol. Bull., vol. 31. 
1916 b Field notes on the distribution and life habits of the tiger 
beetles of Indiana. Proc. Indiana Acad. of Sci., 1916. 
Guyer, M. F. 1910 Accessory chromosomes in man. Biol. Bull., vol. 19. 
Harvey, Erase, Browne 1916 A review of the chromosome numbers in the 
Metazoa. Jour. Morph., vol. 28. 
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LomEN, Franz 1914 Die Hoden von Culex pipiens L. Jena. Zeits. f. Naturw., 
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