88 University of California Publications in Zoology [Vol. 18 



divided into crop, mid-stomach, and the pyloric expansion; intestine 

 and gland of the intestine; and hind-gut, divided into colon and 

 rectum. 



3. The infection by flagellates usually occurs in the mid-gut in 

 the crop, mid-stomach, and pyloric expansion. The rectal portion of 

 the hind-gut has been found infected in a few instances, with spores. 



4. Multiple fission is present. A few somatellae have been found 

 along with internal or endogenous budding. 



5. The life cycle of C. euryophthalmi may be divided into two 

 parts, the infective cycle and the degenerative cj'cle. 



6. The infective cycle consists of ingested spores which develop 

 into large flagellates. These undergo a process of multiple fission 

 designated as internal or endogenous budding. Numerous small 

 zooids result, which migrate posteriorly and become rectal spores. 



7. The degenerative cycle is made up of flagellated forms of vari- 

 ous sizes. Both free and attached forms from the mid-stomach and 

 pyloric expansion are included in this cycle. 



LITERATURE CITED 



DUFOUR, L. 



1833. Eecherches anatomiques et physiologiques sur les Hemipteres, accom- 

 pagnees de considerations relatives a 1 'histoire naturelle et a la 

 classification de insectes. Inst. France, Mem. Savants Etrang., 4, 

 129-462, pis. 1-19. 



McCULLOCH, I. 



1915. Outline of the morphology and life history of Crithidia leptocoridis, sp. 

 nov. Univ. Calif. Publ. Zool., 16, 1-22, pis. 1-4, 1 fig. in text. 

 MiNCHiN, E. A., and Thomson, J. D. 



1912. The rat trypanosome, Tryparisoma lewisi in its relation to the rat-fiea, 

 Ceratopliyllus fasokitus. Quar. Jour. Micr. Sci., 60, 463-692, pis. 

 36-45, 24 figs, in text. 

 Patton, W. S. 



1908. Herpetomonas lygaei. Arch. Prot., 13, 1-18, pi. 1, 2 figs, in text. 



