AMERICAN ENTOMOLOGY. 157 



Tegmina, wing covers of the Orthoptera ; the left laps over the 

 right in Blatta, Phasma, and male Locustae, and generally in 

 Grryllus and Truxalis — the right over the left in Mantis, Mantispa, 

 Acheta, Gryllotalpa, and some female Locusta. See Jiemelytra. 



Tegula, a small scale, resembling the squamula of the Diptera, 

 but more simple and solid, on the base of the superior wings of 

 many insects. 



Tench, one or more bristles attached near the base of the under 

 wing, and passing through the hook (hamus) in many male Lep- 

 idoptera; the females often have the tcndo, but never the 

 hamus. 



Tentacula, retractile processes on the larvae of some species of 

 Lepidoptera. 



Teres, nearly cylindric. 



Tcrgum, the superior portion of the abdomen, separated from the 

 venter by lateral sutures, and divided into segments which are 

 perforated each side with the spiraculee. 



Terminal, situated at the extremity. 



Tessellated, chequered ; figured like a chess-board. 



Testaceous, tile or brick color. 



Tetragonal, having four corners or angles. 



Thigh, the femur; the third joint of the feet. 



Thorax, the dorsal portion of the trunk, included by the dorsal 

 sutures, and including tubercula, anterior angle, posterior angle, 

 base. See pectus. 



Thyrsus, a cluster. 



Tibia, the leg, or fourth joint of the feet ; it is slender, long, 

 enlarging towards the extremity, which is truncated ; includ- 

 ing spinulse, scopa, and corbicula. 



Tip, of the elytra, is that part which is opposed to the base. 



Tomentose, covered with fine hairs so matted together that par- 

 ticular hairs cannot be separated. See lanate, ciliatc. 



Tongue, the ligida or lingua. 



Torose, protuberating ; swelling into knobs or protuberances. 



Torpidity, a state of hybernation in which no exterior signs of life 

 are exhibited. See quiescence, rcvivesccncc. 



Tortilis, twisted. 



Transverse, the longest diameter placed transversely with respect 

 to the body. 



