Bibliographical Notices. 471 
Surface of zoartum very flat; colour brown, with a tinge 
of red; in old states white and highly calcified. 
Primary cell ovate, area occupying about three fourths of 
_ the front surface, with a membranous covering ; margin slightly 
thickened ; about fourteen spines surrounding the area, which 
originate outside and a little below the margin. 
Loc. Cumshewa; Houston Stewart Channel; abundant. 
The primary cell is interesting as giving a clue to the 
genetic history of the species and of the Cribriline form gene- 
rally. There can be little doubt that the ridges which con- 
stitute the chief framework of the front wall in the adult are 
modifications of the spines, which are preserved in the early 
condition of the cell. 
EXPLANATION OF THE PLATES. 
PuatTE XIX, 
Fig. 1. Scrupocellaria varians, n. sp., nat. size. la. Zocecia, magnified. 
1. Dorsal surface. lc. Avicularia. 
Fig. 2. Membranipora nigrans. 2a. Large avicularium. 
Fig. 3. Membrampora protecta, n. sp. Pay 
Fig. 4. Membranipora acifera, MacGillivray, form multispinata. 
Fig. 5. Membranipora echinus, n. sp. ; 
Fig. 6. Membranipora levata, n. sp. 6a. Ocecium. 
PLATE XX. 
Fig. 1. Membranipora exilis, n. sp. 
Fig. 2. Membranipora Sophie, Busk, form matura, 
Fig. 3. Membranipora minuscula,n. sp. 3a. Avicularian area. : 
Fig. 4. Membranipora corniculifera, n. sp. 4a. Zocecium with ovicell, 
showing the horn-like projection on the latter. 
Fig. 5. Cribrilina furcata, n. sp. ; 
Fig. 6. Cribrilina hippocrepis, n. sp. 6a. Primary cell. 
BIBLIOGRAPHICAL NOTICES. 
A Monograph of the British Phytophagous Hymenoptera (Tenthredo, 
Sirex, and Cynips, Linné). By Prrer Cameron. Vol.i. 8vo. 
London: Ray Society, 1882. 
Amone the groups of insects which may be regarded as generally 
neglected by British entomologists, the Hymenoptera, as a whole, 
occupy a tolerably prominent place. Some few of us pay attention 
to the bees, wasps, and sand-wasps of the country ; and the ants are 
pretty well known ; but the great assemblage of insects forming the 
