38 RESEARCHES IN HELMINTHOLOGY AND PARASITOLOGY. 



cylindrical portion i -400th inch ; diverticulum of ventriculus i-66tli 

 inch long by i -266th inch broad. 



Ovum semi-oval, i-25Sth inch long by i-666th broad. 



Habitation. — Found in the intestinum tenue of the domestic cock- 

 roach {B/atta orientalis) y with the former. 



3. 'riiclastovia Labiatum. — Body white, translucent, anteriorly 

 strongly annulated. Papilla of the mouth dilated, six lobed. P'irst 

 portion of oesophagus cylindrical, second portion broad, pyriform ; 

 ventriculus sub-cordiform at commencement. One hundred and fifty 

 annulations, of which there are forty from the mouth to the com- 

 mencement of the ventriculus. 



Length of body i-22d inch ; greatest breadth i-2ooth inch ; length 

 of tail I -40th inch; length of first portion of oesophagus i- 120th 

 inch ; breadth i-ioooth inch ; second portion i -320th inch long by 

 I -400th broad ; breadth of ventricular dilatation i -266th inch. 



Ovum oval, i-333d inch long by i-5ooth inch broad. 



FTabitation. — Found in numbers of from one to a dozen in the in- 

 testine of Polydcsnius virgiiiiensis. 



4. T /let a stoma Robustiiin. — Body white, cylindrical, narrowed an- 

 teriorly and posteriorly. First portion of oesophagus long, cylin- 

 drical, second portion broad, pyriform. Commencement of ventric- 

 ulus dilated, oval, afterwards cylindrical. Articulations of body 

 212, of which there are forty from the mouth to the commencement 

 of the ventriculus, 102 from the latter to the generative aperture, 

 and from this to tail 70. 



Length of body 2 lines ; breadth at ventricular dilatation i-75th 

 inch ; at sixth annulation from mouth only i -320th inch ; at middle 

 i-66th inch ; just above anus i-75th inch ; tail i-22d inch long by 

 i-ioooth inch broad ; at middle, first portion of oesophagus, i-5oth 

 inch long by i- 500th inch broad ; second portion i -178th inch long 

 by i-2ooth inch broad; ventricular dilatation i-io5th inch broad. 



Ovum oval, i -308th inch long by i -500th inch broad. 



Habitation. — Found in the intestine, in numbers of from one to 

 three, in the larva of a lamellicorn insect. 



Remark. — The descriptions of the above are entirely taken from 

 females, considerable numbers of which I have found and possess, 

 but I have never yet been able to discover a single male. 



5. Oxytiris Socialis. — Body white, narrow, cylindrical, elastic, 

 posteriorly attenuated ; mouth projecting, with a short pharynx ; 

 oesophagus consisting of two portions ; first portion long, cylindri- 

 cal, dilated at the posterior part ; second portion narrow, pyriform. 



