104 = The Rev. Wu. Kırzr on a new Order of Insects. 
tite, only one lobe is shorter than the other and differently shaped, 
yet both spring from a common joint embedded in the head *. 
The most striking peculiarity, however, exhibited by our Stylopide 
are their eyes, not so much on account of their being placed on a 
pillar or foot-stalk, a character they possess in common with seve- 
ral other insects}, but from the unusual circumstance of their 
having the hexagonal lenses of which they are composed sepa- 
rated from each other by a septum or partition, which being ele- 
vated above the lenses gives the eyes a cellular surface, so that 
under a good magnifier they have somewhat the appearance of 
diamonds set in jet or ebony 1: these lenses are also very much 
larger and infinitely less numerous, especially in Xenos, than they 
are in other insects that have compound eyes. ‘The eyes of these 
insects, therefore, are of a very unique description, differing 
from all other compound eyes in having these septa, yet not the 
same as the aggregate eyes that distinguish some apterous 
genera$, which are merely a number of simple hemispherical 
eyes, like those of spiders, collected together, and not hexagonal 
lenses as in the insects in question. I shall next notice a circum- 
stance which at once distinguishes them from all Coleoptera and 
Orthoptera, and gives them some affinity with Hymenoptera, I 
mean a narrow collar|| instead of an ample thoracic shield : the 
piece, however, which follows thisq is quite unlike the part ana- 
logous toit in Hymenoptera, in which order it is usually taken, 
but improperly, for the thorax, since it does Hot answer, as the 
* Tas. IX. fig. 13. : 
` + Many of the Crustacea. Many male Ephemera, which besides the common com- 
pound eyes and stemmata have also columnar ones, and several Cimicida. See br Geer, 
tom. ili. p. 338. 343. plate 34. fig. 17. 18. 24. 25. 
f Tas. IX. fig. 10. dd. § Oniscus Latr. Tulas, and Scolopendra. 
|| Tas. VIII. fig. 15. b. 4|. Bid. c. 
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