34 



ENTOMOLOGY 



and Collembola), are situated near the compound eyes and 

 frequently between them. With rare exceptions the antennae 

 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. 



FIG. 41. 



K 



Various forms of antennae. 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 antennae 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 



