186 MESSRS. C. HORNE AND F. SMITH ON HYMENOPTERA 
APPENDIX. 
[Seventeen new species are herein described: seven belong to the Fossorial Group of 
Hymenoptera, five belong to the Family Vespide, and five to the Apide. 
The habits of eight species are more or less detailed in the Notes by Mr. Horne. 
The economy of the genera Pison and Parapison is for the first time made known; 
and considerable addition is made to our previous knowledge of the habits of several 
other genera, particularly of the species of Pemphredon, and also of the social Apide. 
Very little has been previously published on the habits of Indian Hymenoptera derived 
from actual observation. 
The type specimens have been liberally presented by Mr. Horne to the British 
Museum.—F. S.] 
Fam. POMPILID. 
1. PoMPILUS MACULIPES. 
Female. Length 34 lines. Black, and thinly covered with cinereous pile; a white 
spot on the posterior tibiz near their base. 
Head—the clypeus and cheeks bright and silvery in certain lights; the anterior 
margin of the former rounded; the tips of the mandibles ferruginous. The coxe 
beneath and the sides of the metathorax silvery bright, the latter rounded, smooth, and 
shining; the wings hyaline, the nervures black, with a fuscous cloud occupying the 
marginal cell and crossing the wing down to the posterior margin of the third discoidal 
cell. Abdomen smooth, shining, and pilose. 
Hab. Mainpuri, North-west Provinces of India. 
2. AGENIA MUTABILIS. 
Female. Length 34 lines. Black, and covered with a fine changeable silky silvery pile. 
Head covered with silvery pile, which is most dense and bright on the cheeks and 
clypeus, the anterior margin of the latter rounded ; the palpi testaceous, the apical joints 
palest. Thorax silvery, most bright and dense on the coxe; metathorax rounded pos- 
teriorly, with a deep fossulet in the middle of its base, down the centre runs a marked 
or defined channel; the wings hyaline, the nervures black; the posterior femora bright 
ferruginous. Abdomen covered with a beautiful changeable silvery pile, its brilliancy 
changing in every fresh position, the apical segment very smooth and shining. 
Hab. Mainpuri, North-west Provinces of India. 
