13S EXPLANATION OF TERMS 



Telescopic: arranged so that one portion of an organ or process may be drawn 



into another, like the joints of a telescope. 

 Telson: a terminal tubercle bearing the anal opening: the anal segment of the 



insect embryo. 

 Telum: a spear, or spear-shaped process. 



Temple: the posterior part of the gena ; behind, before or beneath the eye. 

 Tempora: the temples. 



Temporal margins: in Mallophaga, the lateral margins of the hind head. 

 Tenaculum: in Collembola, a small organ which holds the furcula in position 



when at rest : = catch. 

 Tenant hair: see tenent hair. 

 Tendo: the anal area of secondaries when it forms a groove for the abdomen: 



has also been called frenum and frenulum : in Trichoptera, a small elliptical 



space at base of hind wings near base of anal veins and behind the trochlea. 

 Tendon: the slender, chitinous plates, bands, strap- or cup-shaped pieces, to 



which muscles are attached for moving appendages : see apodeme. 

 Tenent hair: specialized hair adapted for clinging or clasping. 

 Teneral: that state of the imago just after its exclusion from pupa or nymph, 



in which neither coloring nor clothing is fully developed. 

 Tensor: a muscle which stretches a membrane. 



Tentacle: a flexible sensory or tactile process; in some cases retractile: usu- 

 ally prefixed by a descriptive term indicating the structure to which it is 



attached. 

 Tentacula -um: retractile processes on the larvae of Lepidoptcra. 

 Tentaculate: a margin when fringed with soft tactile processes. 

 Tentiform: shaped like a tent: see mines. 

 Tentoria: Diptera; two hollow, cylindrical struts which pass from the ventral 



border of the occipital foramen to the cheeks. 

 Tentorium: a chitinous frame-work within the head, upon which the brain 



rests. 

 Tenuis: thin, slender; long drawn out. 

 Terebra: a borer or piercer: an ovipositor fitted for boring or cutting as in 



saw-flies : a mandibular sclerite articulated to the basalis ; forms the point 



of the structure and = the galea of the maxilla. 

 Terebrant: with an ovipositor fitted for piercing or boring. 

 Terebrantia: Hymenoptera with sessile abdomen and valved ovipositors: 



Thripids in which the ovipositor of female is borer-like. 

 Teres, Terete: cylindric or nearly so. 



Tergal: belonging to the primitively upper surface: see dorsal. 

 Tergal suture: the Y-shaped dorsal suture on the head of many insect larvae. 

 Tergite: the primitively dorsal part of a segment, especially when that part 



consists of a single sclerite ; usually applied to the abdomen. 

 Tergo-pleural: the upper and lateral portion of a segment. 

 Tergo-rhabdites: the lower pair of corneous appendages forming the ovi- 

 positor in grasshoppers : plates on the inner dorsal surface of the abdominal 



wall. 

 Tergum: the primitively upper or dorsal surface whether it consists of one 



