THE society's NOTE-BOOKS. 267 



Fig. 3. — Rostrum, showing lancets (maxillae ?), x 250. 



J J 4. — End of left antennal forceps (mandible ?), x 250. 



^^ 5. —End of fourth limb of the left side, showing the two claws 

 and " scopuloe." 



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5> 



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6. — Tromhidium, slightly magnified. The relative proportions of 

 the limbs, and the joints composing them, the oral organs, 

 and the hairs, are the parts by wdiich specific identification 

 will be obtained. 



7. — A crushed sj^ecimen of Carabus grannlatus, with a very large 

 female Tromhidium holosericum feeding at the anterior end of 

 the abdomen. 



8. — The stalked and compound eye of two facets. 



9.— Sickle-like mandible from Fig. G, x 100. a, teeth on the 

 cutting edge, more magnified. 



10. — End of left limb of the second pair. The excision of the 

 last joint for reception of the claws when not in use is well 

 shown. 



^'c, the "scopula," an organ for imparting the power of 

 moving over smooth surfaces (scojmla, a brush). It is homo- 

 logous with the " pulvillus " of flies, and is composed of 

 hairs with expanded, sucker-like ends, attached to two or 

 more back pieces. 



11. — Plumose hair, x 200. 



J J 12. — One of the saw-blades from "Gooseberry Saw-fly." The 

 upper outline shows the place of the saw-back (which is not 

 presented on slide) in a groove, in which the saw, when in 

 use, slides backwards and forwards. 



J, 13. — Portion of the cutting edge, enlarged, to show the finer 

 dentations and canals in the substance. 



J J 14. — Illustration of abnormal formation on shell of Hen's egg, 

 X 15. The pearly granules are seen to be of very diflerent 

 sizes, and more or less coalesced. In my own specimen the 

 very small ones are much more numerous than in this. 

 They are found to be firmly adherent to the general shell. 



Drawn by Tuflen West. 



Plate XX. 



Fig. 1. — Sting of ^Yasp, as shown on slide: sh., sheath; st. st., the 



two lancets or stings, x 25. 

 2, 2. — Barbed extremities of the latter, x 100. 

 3. — Diagrammatic representation of the mouth of a small 



Hemipteron (Saw-fly), from a specimen in the possession 



of a member. 

 4. — Diagrammatic sectional view of same: Ibr.^ labrum j mx, 



mx. , maxillic (?) ; md., mandibles {'.). 





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