34 ENTOMOLOGY 
and Collembola), are situated near the compound eyes and 
frequently between them. With rare exceptions the antennz 
have always several and usually many segments. In form 
these organs are exceedingly varied, though many of them 
may be referred to the types represented in Figs. 41-43. 
Fic. 41. 
ee 
rar cae 
(PF XG 
Various forms of antenne. A, filiform, Euschistus; B, setaceous, Plathemis; C, 
moniliform, Catogenus; D, geniculate, Bombus; f, flagellum; p, pedicel; s, scape; E, 
irregular, Phormia; a, arista; F, setaceous, Galerita; G, clavate, Anosia; H, pectinate, 
male Ptilodactyla; I, lamellate, Lachnosterna; J, capitate, Megalodacne; K, irregular, 
Dineutus. 
Though homologous in all insects, the antennz are by no 
means equivalent in function. They are commonly tactile 
(grasshoppers, etc.) or olfactory (beetles, moths) and occa- 
sionally auditory (mosquito), as described beyond, but may 
