STATES OF INSECTS. 207 



intermediate tarsus are bearded internally with a thin 

 fringe of long hairs, and the first externally with a tri- 

 angular one of short ones at the apex : but what is most 

 remarkable, the last or unguicular joint, which in al- 

 most every other bee is naked, is on both sides fringed 

 with long hairs a . In that remarkable genus Acanthopus 

 Iliig., of which the male only is known, the first and last 

 joint of the intermediate tarsus have a dense external 

 brush of stiff hairs, which probably is also a sexual cha- 

 racter b . Another sexual kind of clothing is exhibited 

 by the females of those bees that have their labrum or 

 upper-lip inflexed (Megachile Latr.) c . Their abdomen 

 is covered underneath with a brush of stiff hairs, involved 

 in which they carry the pollen they collect. In the males 

 of some of this tribe, as of M. Willughbiella, the first four 

 joints of the anterior tarsus on their inner side have a 

 long dense fringe of incurved hairs d : a circumstance 

 also to be found in the same sex of Xylocopa latipes, in 

 which the claw-joint also is bearded e . In Andrena Latr. 

 the last dorsal segment of the abdomen of the same sex is 

 fringed, while that of the male is naked f . In the humble- 

 bees (Bombus), the mandibles of the male are bearded 

 with curled hairs, while those of the females and neuters 

 are without them. Some bees, as Andrena and Halictus 

 Latr., have the anus of the female bearded, and that of the 

 male naked : in some Bombyces the reverse takes place. 



A Kirby Mon. Ap. Angl. i. t. xi. Apis #*. d. 2. x. /3./. 18 a. b. c. d. 

 b Coquebert Illustr. Icon. i. t. vi.f. 6. 



c Kirby Mon. Ap. Angl. i. Apis **. c. 1. «. #*. c. 1. /3. **. c. 2. x. 

 **. c. 2. /3. **. c. 2. y. **. c. 2. 1. 



d Ibid. t. viii./. 28. f. g. « Christ. Hymenopt. t. iv.f. 3. b. 



f Kirby Mon. Ap. Angl. i. t. iv. Melitta *#. c.f. 1. a. 



x 2 



