162 Mr. WALKER on Chalcidites. 
piceous: wings nearly limpid; nervures piceous; humerus a little more than twice 
the length of the ulna; radius very much longer than the ulna; cubitus much shorter 
than the ulna; stigma of moderate size. 
Found by Dr. Greville near Edinburgh. 
It is nearly allied to S$. convexum (Ent. Mag. ii. 290). 
I add a few words in explanation of the terms, not in general use, which I 
have employed for describing the parts of insects in the preceding pages : 
Propedes, or fore legs. 
Mesopedes, or middle legs. 
Metapedes, or hind legs. 
Proalz, or fore wings. 
Metalz, or hind wings. 
Propodeon, or the segment between the metathorax and the petiole. 
Podeon, or the petiole. 
Metapodeon, or the first segment of the abdomen. 
Octoon, or the second ditto. 
Ennaton, or the third ditto. 
Decaton, or the fourth ditto. 
Protelum, or the fifth ditto. 
Paratelum, or the sixth ditto. 
Telum, or the seventh ditto. 
—5ee the ‘ Entomological Magazine,’ vol. i. p. 400, &c. 
