334: STATES OF INSECTS. (Jmago.) 
the genus Luglossa, in the females of which this part is 
triangular, very broad towards the apex, and fitted for 
carrying a large mass of pollen paste. The tibize of the 
males of some Lepidoptera are remarkable in this re- 
spect. That of Hepiolus Aumuli is much more hairy ; 
but in H. Hectus it is a dilated mis-shapen mass, with- 
out a tarsus, and with long scales pendent from the 
disk*. Differences of this kind also occur in the cal- 
caria or spurs that arm the apex of the tibize of a large 
number of insects. Thus in Acanthopus, a singular bee, 
in the male the spur of the intermediate leg is dilated 
at the apex, and armed with six strong spines, the inner 
one larger than the rest’. 
But the part of the leg in which the sexes most vary 
is the ¢arsus ; and this variation takes place both in the 
number of the joints, and their form and circumstances. 
The first case has been observed only with regard to 
certain species of Cryptophagus, as C. fumatus, &c. in 
which the female is pentamerous, or having jive joints 
in all the tarsi; and the male heteromerous, or having five 
joints in the two anterior pairs, and only four in the 
posterior®. With respect to the form of the tarsal joints, 
the sexes more frequently differ; and by inspecting this 
part, especially in the predaceous and carnivorous Co- 
leoptera, you may often, without further examination, 
ascertain whether any individual is male or female. 
Even in the slender-footed Cicindelide, the three first 
joints of the anterior tarsus of the male are more dilated 
than the two last, and covered underneath with a brush 
* De Geer i. ¢. vil. f. 14, 15. 
» Coquebert Jdust. Icon. i. t. vi. f. 6. Puare XXVIL. Fic. 32. 
© Illig, Mag. iv. 214. Gyllenhal. Insect. Suec. i. 168. 
