288 
MODERN SYSTEM. 
in the spring when the willows are in bloom. The males are most 
abundant in the autumn. 
Sp. 1. Bom, terrestris. 
Bombtts terrestris. Fubr., Latr., Leach. Apis terrestris. Linn. 
Inhabits Europe. 
** Binder tibia without spurs or heels. Superior wings with two or 
three submarginal cells, the last oblique or linear. 
Genus 488. APIS of authors. 
Hinder tarsi with their first joint long: superior wings with three sub* 
marginal cells complete, the last oblique and linear. 
Sp. 1. Apis nullified (hive bee). 
Apis mellifica of authors. 
Inhabits Europe. 
Order XIV. RIIIPIPTERA. Lair., Leach. 
Order Strepsiptera. Kirby. 
Order Hymenoptera. Rossi. 
“ Xenos, the genus serving as the type of this singular order of in- 
sects, was discovered by Rossi, who referred it without hesitation to 
the Hymenoptera, and placed it next to Ichneumon. Another ge- 
nus ol the same order was found by Kirby, and was described in bis 
celebrated Monographic i Ajntm Anglia under the name of Stylops , 
with expressions of doubt as to its systematic situation. Latreille 
soon after received from De Brebisson a species of Stylops, and a* 
the end of his Genera Jnscetorum el Crustaceorum, observes, that it 
seems to disturb our entomological systems, not being referable to 
any of the established orders. Professor Peck detected a new spe- 
cies of this group in America, and communicated it to Kirby, who 
considered it to constitute with his Stylops a peculiar order of in- 
sects, on which he gave a dissertation to the Linnean Society of Lo *■ 
don, which was published in the eleventh volume of their Transac- 
tions. I adopted the characters that were laid down by this learned 
entomologist, as well as the name Strepsipteru, by which it was de- 
signated. Since then LatreiJle lias convinced me that the supposed 
elytra are but moveable processes attached to the anterior part of 
the thorax ; whereas true elytra arise from the second segment of 
the trunk, and always more or less cover the wings, which these 
parts do not touch. Anxious to become acquainted with all the 
characters ol the order, I commenced an examination of the mouth* 
and was soon convinced that the parts of it were far from being ob- 
solete ; but fearing to undertake the dissection, I submitted the spe- 
cimen to the inspection of Savigny, from whose exact and almost 
infallible hand and eye I felt confident of gaining the desired infer- 
