4:34, MODERN CLASSIFICATION OF INSECTS. 
and the drawings of General Hardwicke, as to these insects being used 
by the ants instead of Aphides, for obtaining a supply of saccharine 
fluid; the same fact is also recorded by Spix and Martius (Delect. 
Anim. art. Brasil. Introd. p. 24.), as well as by Beske, as published 
by Burmeister (Silberm. Rev. Ent. No. 5.; see also Rev. L. Guild- 
ing in Mag. Nat. Hist. No. 43.). Mr. Swainson also, unacquainted 
with these authorities, has stated the same fact as one unknown, in 
his just published Treatise on the Instincts of Animals. Burmeister, in 
his monograph on Combophora, quotes the following statement of 
Beske as to the habits of C. Besckii (Membracis cucullata Perty, Del. 
pl. 35. f. 9.), one of the most remarkable species in the family : — 
“‘Insectum declaratum hostem saltans timide effugit, et pronotum 
in fuga perdit sed nunquam recuperat. Semper formicam id comi- 
tantem observavi, swccwm e sutura capitis et thoracis exsudantem 
haurientem ; nympha insecto declarato similis sed pronotum brevissi- 
mum abdominis basin vix tegens, globulum parvum apice trispinocsum 
emittit; elytra et ala breves incomplete.” The pupa is figured by 
Burmeister, loc. cit., together with the imago. 
My fig. 116. 1. represents the imago, and fig. 116.6. the full-grown 
Jarva (as I consider it to be) of Ledra aurita, from specimens in my 
collection ; the latter exhibiting only the rudiments of the prothoracic 
elevations, and the wing-cases not being so much developed as they 
are in the more mature state of pupa, nor extending beyond the me- 
tathorax. I also possess a very young larva of the same insect, in 
which these peculiarities are still less evident. I also possess the pupa 
of Centrotus Genistz, in which the prothoracic elevation is but slightly 
developed, but the abdomen is considerably elongated and attenuated 
at the tip. The curious insect figured by Stoll, pl. 16. f. 85., having 
a long furcate horn arising from the prothorax, and several pairs of 
elevated spines from the abdominal segments, and which Laporte has 
raised into a genus under the name of Acanthicus (Ann. Soc. Ent. 
France, tom. i. pl. 6. f. 7.), appears to me (from a specimen in my 
collection) to be a pupa of some species of Centrotus, the four wing- 
cases being well developed. Such also is the opinion of Germar in 
Silberm, fev. Ent. N. 4. 

The section DimerA of the order comprises much smaller insects 
than the preceding, from which they are distinguished by having only 
