230 GLOSSARY. 



Imago. — Insect in perfectly-developed stage, as butterfly, fly, beetle, 

 &c. 



Labium. — Lower lip. 



Labnnn. — Upper lip ; this is placed vertically over the lower lip, with 

 the two pairs of jaws placed horizontally between the two lips. 



Larva. — First active stage of insect life, as caterpillar, maggot, &c. 



Legs. — In the perfect insect, formed of four chief pieces, — hip (coxa)y 

 thigh (Jhiivr), ?hank (tibia), and foot (Uirstt^) ; with a small piece,, 

 called the trochanter, between the hip and thigh. In larva?, 

 short legs of various forms, and sucker feet, or prolegs. 



Mandibles. — Upper jaws, placed horizontally opposite each other 

 beneath the upper lip. 



Maxilla. — Lower jaws, placed similarly to the above, just below the. 

 " mandibles," and furnished with feelers; thence called feeler- 

 jaws. 



Maxillary iialpi. — Feelers on the lower jaws. 



Mouth. — Formed of six pieces, an upi^er lip [labruin), lower lip. 

 {labium), with two pairs of jaws ojoposed horizontally between 

 them, of which the upper pair (mandibles) are often strong, and 

 serve for biting with ; the lower pair [maxilUc, or feeler-jaws) are- 

 usually smaller and weaker, and are furnished with feelers or 

 jHiljn, as is also the labium. In butterflies, Aphides, A^c, that 

 have sucker-mouths, some of the above-mentioned portions are 

 variously altered in shai^e.^See Proboscis. 



Ocelli. — Minute single eyes, usually three in number, fixed on the 

 crown of the head, commonly known as simple eyes. 



Oviparous. — Producing eggs. 



Ovipositor. — Instrument whereby the female insect lays her eggs. 



Ovuvi.—Bgg. 



Palpi. — Feelers, placed on the lower jaws and lower lip. 



Poisers (see Halteres). — Appendages in the place of the hinder wings. 

 of the Diptera. 



Proboscis. — In butterflies, altered lower jaws forming the spiral 

 trunk ; in two-winged flies, the altered lower liji enclosing the 

 piercers. 



Prolegs. — Sucker-feet, whereby caterpillars and other larva? hold 

 firmly to the substance they are placed on. 



Pulvilli. — Cushions beneath the feet of flies, and some other insects. 



Pupa. — Second stage of insect life, in which it is often inactive, as 

 with the chrysalis of butterflies. 



Rostrum. — Sometimes called snout, when applied to the prolonged 

 front of the head of some kinds of beetles; also used as well as 

 proboscis for the altered labium of Ajjhides. 



Scutellum. — A name sometimes ai>plied to a portion of each segment 

 of the thorax, but especially to the triangular shield-shaped plate 

 between the base of the wing-cases in beetles and bugs. 



