128 



BOARD OF AGRICULTURE. 



moths, called setiform or bristle-shaped, with fine cilia or hairs, 

 two on each joint ; H, another form of antenna, called doubly 

 pectinate, or furnished with teeth like those of a comb, on both 

 sides. 



Figure 2, represents other forms of antenna, con- 

 siderably magnified. A, lamellate, or composed of 

 leaves, antenna of a beetle, Polijphylla variolofia ; 

 B, three-jointed antenna, of which the third joint is 

 reniform or kidney-shaped, and furnished with a 

 bristle, antenna of fly, Sijrphus ; C, setiform or 

 bristle-shaped, antenna of dragonfly, Libellula. 



Fig. 8. 



Figure 3, different forms of mdndibles, or outer jaws, and 

 haustella, or suckers, magnified. A, mandible of Ciciadela 

 purpurea, or purple tiger-beetle, Coleopterovs ; B, mandible 

 of Phylloplera, or green grasshopper, Orihdpterous ; C, mandi- 

 ble of Libellula trimaculdta, or three-spotted dragonfly, Neurdp- 

 terovs ; D, mandible of Vespamaculdta, or paper-making wasp, 

 "hornet," IIijmeHojderons ; E, i^os^/-w?» or jointed sucker of 

 Clmex lectuldrivs, " bed-bug ;" F, Proboscis or sucker of a 

 mosquito, Culex. The shoi't jointed instrument at the extreme 

 right is the palpus, the next and longer ))iece the lower lip, in 

 which the lancets are sheathed ; to the left of this are the four 

 slender piercing instruments, the two middle ones being the 

 finest, and appear in the cut as one piece split at the tip, the 

 two outer ones are very finely serrate or barbed on one of their 

 edges ; the piece on the left is the upper lip, which covers and 

 protects the delicate piercing apparatus when sheathed. 



vA Figure 4, exhibits the leg of a ground-beetle of 



^"^ ^ the genus Ildrpalus. A, the Coxa, or hip, which fits 



'jo into a corresponding socket in the under part of the 



thorax; B, the troclidnlcr, or joint between the hip 



and the thigh ; C, \.\\q fdmur, or thigh, which is gcn- 



v\g. 4. crally the largest joint and extends beyond the sides 

 of the body ; D, the tibia, or shank, which is frequently 



