362 



FAMILY: TRYPANOSOMID^ 



f^-ii i i \ 



33 



\n 



Fig. 168. — Crithidia euvyo'pliiliclmi from Intestine of Euryophthahnus convivus, 

 arranged so as to show the various forms which occur in different 

 Parts of the Alimentary Canal (x 1,750), (After McCulloch, 1917.) 



1. Diagram of alimentary canal: res., oesophagus; cr., crop; mid.stom., mid-stomach; pyl.ex., 

 pyloric expansion; int., intestine; int.gl.,Lntestina,\ glandular epithelium ; ?/ii., Malpighian 

 tubes; c, colon; r., rectum. 2-35. Various flagellate types explained in text. 



1. Ovoid forms, which are presumably those taken up casually in the 

 food. They are about 3-2 microns in length, and occur in the crop 

 (Fig. 168, 2). 



2. Every stage in growth of the ovoid forms uj) to the elongate flagellates 

 10 to 30 microns in length. As growth takes place, they migrate back- 



