THE ENTOMOLOGIST. 215 
species of Diptera (Senometopia spinipennis and Conops 
flavipes); two other Crypti (C. confutor and C. signatorius) 
being cited by Dr. Giraud. The Zonitis devoured the egg 
and pollen-paste whereon the Stelis also subsisted; the 
Chrysis, Crypti and Senometopia fed upon the soft larve 
externally ; Halticella was reared within the more solid adult 
larvae, whose tegument, desiccated and black (as in specimens 
exhibited), served for the hybernation of the parasite; the 
Melitobia destroyed the nymph in its soft state by external 
attack, and the Conops deposited its egg in the body of the 
bee itself after maturity. Specimens of this Osmia alive, and 
of the briars from which they were produced, were also 
exhibited, 
Chrysomela cerealis.—Mr. Champion exhibited a series of 
recently-captured individuals of Chrysomela cerealis from 
Snowdon, its only known British locality. Mr. M‘Lachlan 
stated that he had recently seen this species in the Depart- 
ment of the Sadne et Loire, in France, in great numbers, each 
ear of wheat having several of the beetles upon it, and 
remarked on the singular nature of its sole habitat in Britain. 
Trap-door Spiders in the Bark of a Tree.—The Secretary 
exhibited nests of a trap-door spider containing living 
inmates, sent from Uitenhage, near Port Elizabeth, by Mr. 
Henry W. Bidwell, a member of the Legislative Assembly of 
the Cape of Good Hope. The nests were not (as is usual) in 
the earth, but in caviuies in the bark of trees, and the “ trap- 
door” appeared to be formed of a portion of the bark, thus 
rendering it most difficult to detect the nests when in a 
closed condition. The Secretary was also informed that 
similar nests were constructed in door-posts and other 
places. 
American Locusts and Army Worm.—My. Riley, State 
Entomologist of Missouri, exhibited sundry of the insect-pests 
that do so much damage in the United States, including the 
army worm (Leucania unipuncta) and the Rocky Mountain 
locust (Caloptenus spretus), and entered at some length into 
the habits of the latter insect, and the vast amount of desti- 
tution caused by it, stating that in a short period it devoured 
almost every living plant, leaving nothing but the leaves of 
the forest trees, and converting a fruitful country into an 
absolute desert. From a knowledge of the habits of the 
