668 



Ctrarfurg of 



changes Its skin several times, avoids the 

 >ight, and at length assumes the pupa state, 

 without forming any eocoon ; the imago ap- 

 pearing at the expiration of about six weeks, 



tumours form the abode of the larvae which 

 reside within them, and the insect makes 

 with its teeth a circular hole for its escape. 

 They greatly resemble the Caterpillars of 

 Ipidopterou3 insects ; but usually differ 

 from them as to the number of their feet, 

 which are either restricted to six, answering 

 to those of the perfect insect, or amount to 

 eighteen or twenty-two. In order to undergo 

 their change into the pupa state, they spin 

 a cocoon, either on the earth or on the plants 

 on which they have fed ; but they do not 

 become pupae until they have been inclosed 

 in this for many months, and only a few 

 day* before they come forth as perfect Saw- 



I .'-- 



(TKNEBHIO MOMTOR.) 



at first being of a reddish-colour, but soon 

 assuming its black hue. The larvae of theje 

 insects are greedily devoured by nightingales 

 and other insectivorous birds, and are ac- 

 cordingly bred by bird-fanciers ; it is ne- 

 cessary to keep the vessels in which they are 

 placed firmly closed, or they make their 

 escape, neither wood nor cloth being suffi- 

 ciently strong to prevent them from boring 

 their way through. 



TENREC. (Centetes.) A genus of small I 

 insectivorous quadrupeds found in Mada- j 

 gascar, closely resembling the Hedgehog in 

 their general character, but differing in their 



i dentition, the feebleness of their spines, and 

 in their being much less able to roll them- 

 selves into a ball. The Tenrec is known 

 also by the name of the ASIATIC or STRIPED 

 HEDGEHOG. It is seven inches in length ; 

 and is characterized by a long, pointed 

 muzzle ; short legs, with five toes on each 

 foot, separated and armed with crooked 

 claws ; and no tail. It is of a black colour ; 

 with five longitudinal bands on the body : 

 all the black parts are covered with hard 

 hair ; the white bands with small prickles. 

 From the black bands on the back spring 



! long scattered hairs which reach to the 

 ground ; the head is covered with short 

 block hairs or prickles ; the snout is white ; 

 the eye surrounded by a white circle ; and 

 the feet are reddish. The Tenrecs move I 



! slowly ; grunt like pigs, (for which reason 



' they are sometimes called Ground-hogs or 

 Pig-porcupines) : they grow extremely fat ; 

 multiply prodigiously ; and burrow under 

 ground : they are nocturnal in their habits ; 

 and remain torpid during great part of the 



TENTHREDINITXiE. The name given 

 to a family of Hymenqpterous insects, popu- 

 larly known as Saw-flies, from the saw-like 

 character and action of the ovipositor. With 

 this they make a number of small holes in 

 the branches of trees, inserting an egg in 

 each hole, and closing the hole with a drop 

 of frothy fluid. The wound thus made be- 

 comes more and more convex by the increase 

 in size of the egg, and sometimes these parts 

 assume the size of a gall, either woody or ' 

 pulpy, according to the parts injured : these 



flies. Our figure represents the Cimbex va- 

 riabilis, a member of this large family. It 

 belongs to a section which by some natural- 

 ists has been raised into a distinct family, 

 from the species having clubbed antennae. 



TENUIROSTRES. The name of a tribe 

 of Insessorial birds, comprehending those 

 which are distinguished by a long and slender 

 bill. Mr. Swainson, in his ' Classification 

 of Birds,' remarks that the most aberrant 

 division of the insessorial order is that of the 

 Tenuiroetres, or honey-suckers, so called from 

 the great majority deriving their subsistence 

 both from insects and the nectar of plants, 

 which they suck up by means of a long or 

 filamentous tongue adapted for the purpose. 

 [See NUTHATCII : CREEPER : SUNBIKD, Stc.] 



TEREBELLUM. A genus of Mollnsca, 

 whose shells are oblong, subcylindrical, and 

 very smooth ; spire pointed ; sutures not 

 channelled ; aperture narrow and long, 

 wider anteriorly ; outer lip slightly thick- 

 ened, truncated ; inner lip thin, smooth, 

 nearly straight, and spread over a portion 

 of the body whorl. These shells are brough t 

 from the Indian seas ; they are thin, delicate, 

 and prettily marked with bands and cloudy 

 spots. In its habits the animal of the Tere- 

 bcnum is exceedingly shy and timid, re- 

 tracting its body into the shell on the slightest 

 alarm. It will remain stationary for a long 

 time, moving its tentacles about cautiously 

 in every direction, when, suddenly, it will 

 roll over with its shell, and continue again 

 perfectly quiet. 



TEREBRANTIA. The name of a section 

 of Hymenopterous insects, characterized by 

 the possession of an anal instrument orga- 

 nized for the perforation of the bodies of 

 animals, or the substance of plants. The 

 borer (terebra) is peculiar to the female, and 

 is composed of three long and slender pieces, 

 of which two serve as a sheath for the third ; 

 it is placed at the anal extremity of the 

 abdomen, and the oviduct is continued into 

 it. The females instinctively use this weapon 



