248 ENTOZOA. 



In connection with these views of Weinland and Leuckart, I 

 may here mention that I have fed a number of cockroaches (Blatta 

 orientalis) with the eggs of Tcenia cucumerina of the dog, but I 

 have not succeeded in rearing any cysticerci in their bodies. Not 

 discouraged by negative results (which often advance our science 

 as much as positive ones), I yet purpose to feed some of these 

 insects with the eggs of T. elliptica from the cat ; and if I should 

 succeed in thus giving the cockroaches the "measles," I shall 

 then have less hesitation in pronouncing Leuckart's opinion, as 

 to the distinctness of these two tapeworm-forms, correct. 



16. T^NIA MAEGINATA. 



T. marginata, Batsch, Rudolphi, Dujardin. 



T. cuGurhitina, Pallas ; Bloch. 



T. lu^nna, Schrank. 



T. cateniformis lupi, Goeze. 



T. ex cysticerco tenuicoUi, Kiichenmeister. 



T. tenuicollis, Giinther; Moquin-Tandon. 



T. hydatigena, Pallas ; Bloch. 



T. Jiydatula, Linneus. 



T. globosa, Rudolphi ; Grmelin. 



T. simice, Grmelin. 



T. f err arum, Gmelin. 



T. cajprina, Gmelin. 



T. ovilla, Gmelin. 



T. vervicina, Gmelin. 



T. bovina, Gmehn. 



T. apri, Gmelin. 



Halysis marginata, Zeder. 



This species infests man only in the immature or cysticercal 

 condition, the full-grown tapeworm (strobila) being found in the 

 do2" and wolf. It has often been confounded with the Tcenia 

 serrata, from which, however, it differs in the comparatively bulky 



