237 Vag 



Urosternites. — The sternal sclerites. (Packard.) 



Ustulate. — So marked with brown as to have the 

 appearance of being scorched. (L. ustulatus, of 

 iistulo, to burn.) 



Uterus. — The vagina ; the term is generally used 

 with the pupiparous forms. (L. the lower part 

 of the belly ; inner part ; the womb.) 



Utriculi majores and breviores. — The numerous 

 large and short utricles which the seminal 

 vesicles bear. (L. utriculus.) 



Utrinque.— With respect to the direction of parts, 

 the term is used to indicate a quality or 

 peculiarity found on each side of the body and 

 at the same place. (L. utrinque, on both sides.) 



Utricle. — A little bag or bladder; a cell; a thin 

 capsule of one cell, containing a single sperm. 

 (L. utriculns, a small skin, from ider, a bag or 

 bottle of hide.) 



Utricles. — Numerous tubes found in the sperm- 

 vesicles. (L. utriculus.) 



Utricular. — Containing utricles ; furnished with 

 granular vessel-like little bags ; like a utricle. 

 (L. utriculus.) 



Vagina.* — The short passage formed by the two 



oviducts uniting, which opens to the outside 



through a special sclerite situated between the 



seventh and eighth sternites of the abdomen. 



(L. a sheath.) 



* In some insects (Thysanura, Ephemera), the vagina 

 is wanting, and both the oviducts open direct on 

 the post ero- ventral surface of the body. 



