Tue following pages contain descriptions of species of ten 
genera of Chalcidites, a tribe of Hymenopterous Insects. The 
genera are, — Aphelinus, Pteroptrix, Entedon, Eulophus, 
Cirrospilus, Pachylarthrus, Miscogaster, Ormocerus, Ptero- 
malus, and Stenocera. The first has five-jointed tarsi, and is 
nearly allied to Encyrtus. The second has four-jointed tarsi, 
and some of the species belonging to it are the smallest of the 
tribe. The three following have also four-jointed tarsi, and 
may be thus distinguished: — 
1. Nervus solitus proale triente plus duplo longior— 
a. Nervus cubitalis brevissimus .......6.eesesecseeeeeesese-.. Envepon. 
6. Nervus cubitalis Tanguay <sc nearer ene Evroruus. 
2. Nervus solitus proale triente duplo longior .........0000.e000 Cirrosritus. 
The five remaining genera have five-jointed tarsi, and are 
characterised in the Entomological Magazine, 
