EXTERNAL ANATOMY OF INSECTS. 51*7 



(Curcidio L.), and those of the bees (Apis L.), except in 

 the males, it is as long nearly as the remainder of the 

 antenna?, which forms an angle with it. In shape it is 

 generally somewhat curved and subclavate, or increasing 

 in size from the base to the summit ; but it is sometimes 

 straight and filiform, at others oblong or square, at 

 others again triangular, in several instances three-sided : 

 in one (Cetonia cruenta F. Genuchus K.) it is, as it were, 

 broken, the upper part forming nearly a right angle with 

 the lower ; in Cerocoma Schafferi it is foliaceous ; and it 

 is occasionally suborbicular : and probably many other 

 forms might be enumerated. 



The Pedicellus* is the second, and may be deemed the 

 least conspicuous joint of the antennas. Though more 

 slender than the scape, it is generally thicker than that 

 which immediately follows it. In broken antennae it is 

 the hinge or pivot on which the clavola or upper mem- 

 ber turns : it is usually very short, campanulate or bell- 

 shaped, or obconical ; but in a species of bug ( Tetyra, 

 from New Holland — T. pedicellata Kirb. MS.) it is 

 nearly as long as all the rest of the joints taken together. 

 In those species of Lycus, a genus of beetles related to 

 the glow-worm, that have flattened antennas (as L. reti- 

 culatus, fasciatus, &c), this joint is almost received into 

 the socket of the scape, so that their antennas appear at 

 first to have only ten joints, but in those which have 

 those organs filiform (as L. minutus, Aurora, &c.) it is 

 more conspicuous. 



The Clavola b , or remaining joints of the antennas 

 taken together, constitutes the principal part of the or- 

 gan, which, especially at its extremity, exercises its func- 



3 Plates XI. XII. XXV. I'. h Ibid, ra' . 



