STATES OF INSECTS. 319 



The antennae of the sexes also sometimes differ in 

 magnitude and length. This is the case in the three ge- 

 nera of wild bees just mentioned ; those of the female be- 

 ing thicker than those of the male, while these last are 

 longer than the former. But in this tribe the males of 

 the Fabrician genus Eucera are most remarkable for their 

 long antennas a . With regard to the different length of 

 these organs in the sexes, no insects are more distinguished 

 than some species of the capricorn-beetles {Cerambyx L.). 

 In Lamia Sutor the male antennae are twice the length of 

 the female ; and in another Brazilian species in my cabi- 

 net, related to L. annulata (Stenocorus F.), they are thrice 

 their length. Some of the Anthribi F. approach the 

 Cerambycidcc, not only in some other characters, but also 

 in this circumstance : — thus the antennae of A. albinus, a 

 native of Britain, are vastly longer in the male than in 

 the female; and in A. cinereus (Macrocephalus Oliv.) b , 

 which I suspect to be of the former sex, they are as long 

 nearly as is usual in the tribe just named, called in France 

 capricorn-beetles. 



I may here observe, that sometimes in the sexes a dif- 

 ference is also to be found in the direction or flexure of 

 their antennae. Thus in Scolia F., Pepsis F. &c, in the 

 males the antennae are nearly straight, but in the females 

 convolute or subspiral. The reverse of this takes place 

 in Epipone spinipes, a kind of wasp, and its affinities; and 

 Systropha Illig., a kind of bee : for in these the male an- 

 tenna is convolute at the apex c , and the female straight. 

 In the various tribes of bees (Anthophila Latr.), these 



a Mori. Ap. Angl. i. Apis **. d. 1. t. x.f. 7- 

 b Oliv. no. 80. Macrocephalus, t. i.f. 2. 

 c Latr. Gen. Crust, et Ins. iv. 15b', 



