344 GLOSSARY. 



Tetragonal. Having four sides or angles. 



Thorax. The second primary segment of the body, bearing the legs and 

 wings. 



Thyridium. A small pale or almost transparent spot near the anasto- 

 mosis of the disk of the wings in Phryganina. 



Tibia. The shanks ; that part of the leg between the femur and tarsus. 



Trapezoidal. Four-sided, with two sides unequal and parallel. 



Triangle. A three-sided figure ; found in the front wings of Libellula 

 near the base. 



Triarticulate. Composed of three joints or articles. 



Trifid. Cleft into three ends. 



Trifoveolated. Furnished with three pits or foveae. 



Trigonal. Triangular, three-sided. 



Trilobed. Having three lobes. 



Triquetral. Having three more or less long angles. 



Trochanters. The joints of the legs situated between the femora and 

 coxae.. 



Truncated. Cut square off. 



Tuberculoid. Resembling a tubercle. 



Tuberculose. Covered with tubercle-like prominences. 



Unguiculus. A nail, like that at the extremity of the tarsus. 



Unguiculi. Plural of Unguiculus. 



Unique. A single individual of a kind. 



Vaginated. Covered with a sheath-like plate, or vagina. 



Valvule. A small valve-like process. 



Venter. The under surface of the abdomen. 



Ventral. Pertaining to the under surface of the abdomen. 



Verrucose. Covered with wart-like prominences. 



Vertex. The upper part of the head, just above the front. 



Vesicle of the penis. The bag-like appendage on the second ventral 

 segment of the male dragon-fly. 



Villose. Clothed with soft, rather long, hair. 



Violaceous. Violet-colored. 



Viridescent. Somewhat greenish. 



Vulva. The orifice of the female genital tube. 



Vulvar. Pertaining to the vulva. 



Vulvar lamina. The scale or appendage upon the ventral surface of the 

 eighth segment in the female dragon-fly. 



To those desirous of becoming better acquainted with the terminology 

 of Neuroptera, especially that of the neuration of the wings, the following 

 inexpensive little work may be recommended: Neuroptera austriaca, by 

 Friedr. Brauer and Franz Loew, Vienna, 1857, with five plates. Although 

 written in German, it will prove useful, on account of its plates, even to 

 those not familiar with that language. 



