REVIEWS. 103 



escape of the ova is thought to be a very anomalous thing in 

 nature, — the nearest approach to it being, probably, in the case of 

 the Coccus, or Scale-insect, where the mother dies immediately after 

 the deposition of the eggs, and forms a sort of roof over them 

 with her dead body, which protects them during the cold of 

 winter. 



Mr. Michael has also ascertained that the soft, white, Acarus- 

 stage passed through by Hoplophora^ as described above, is not by 

 any means confined to that species. He names other genera and 

 species of the Oribatidce, the larvae of which live in Fungi or 

 dead wood, which they perforate with long burrows in all direc- 

 tions until the substance is often thoroughly riddled by them, — the 

 larva or nymph, as the case may be, being usually found at the 

 end of the burrow farthest from the mouth, the last place to 

 which it has worked. In all these instances, the larvae or nymphs 

 are soft, white creatures, entirely without the hard and dark 

 defensive armour possessed by other members of the family which 

 are more exposed to danger. — Editor?^ 



EXPLANATION OF PLATE X. 



Fig. 1. — Beetle-Mite, Notaspis hipUis. 



* Breathing-pores, with hairs, 

 t Remarkable hairs. 



,, 2. — Mouth of Notaspis hipilis, seen from beneath ; p), palpi ; mx, 

 maxilh^e (probably not homologous with the maxillye of winged 

 insects) ; c//, chelee (possibly mandibles). 



,, 3. — One-clawed foot of Hop)lop]iora ferruginea. 



,. 4. — Three-clawed foot of Notaspis hipilis. 



,, 5. — Single chela, extracted from the mouth, and viewed sideways. 



IReviewa, 



KNOCK'S ENTOMOLOGICAL SLIDES. 



We have much pleasure in acknowledging the receipt of some of 

 Mr. Enock's excellent Insect-Preparations, which we very 

 cordially recommend to all students of Entomology. The 

 insects are mounted without pressure ; and while retaining their 

 perfect form, have lost but little (if any) of their natural colour— 



