14 



ILLINOIS BIOLOGICAL MONOGRAPHS [224 



Partial List of Animals Examined for Gregarines 



Number examined Number parasitized 



Passalus cornutus 2 4 

 Elateridae 



Coccinellidae 3O 



Coccinella sp. IO 



Coccinella novemnotata 5 



Amara angustata 5 



Coptotoinus interrogatus 7 5 



Orthoptera 



Ceuthophilus stygius 15 



Forficula auricularia 15 



Ichnoptera Pennsylvania 10 4 



Gryllus abbreviatus 200 150 



Gryllus Pennsylvania 100 80 



Melanoplus femur-rubruin 300 200 



Melanoplus differentialis So I0 



Melanoplus acridiorum 5 5 



Melanoplus bivitattus 10 6 



Schistocerca americana 2 i 



Dissosteira Carolina 10 5 



Encoptolophus sordidis 25 15 



Arphia sulphurea 5 



Hesperotettix pratensis 10 



This list is incomplete for many animals were examined and not identified when 

 parasites were not found. The numbers given above are approximate. 



LOCALITIES REPRESENTED 



The hosts from which the parasites described in this paper were 

 taken occurred chiefly in and around Urbana, Illinois. Some were taken 

 in New Jersey, many on Long Island, and the marine material from Long 

 Island Sound; material was received from Haverford, Pa., Colorado 

 Springs, Colo., and Lincoln, Neb., which afforded new data on the distri- 

 bution of several species. 



SEAT OP INFECTION 



The most frequently observed location for the sporonts is the mid in- 

 testine of the host. The parasites are not found in the esophagus, crop, 

 or rectum except when the infection is very heavy. The pyloric caeca are 

 sometimes infected and parasites attached to the intestinal walls have 

 been recovered in great numbers from the coelom of a very few insects. 

 Cysts are often recovered from the mid intestine but usually from the rec- 

 tum. They can be easily procured from the moistened feces of those spe- 

 cies in which they are large enough and opaque enough to be distin- 



