208 GRAMMAR OF ENTOMOLOGY. 



without a sting ; colours excessively brilliant, red, 

 green, and blue, with a metallic gloss ; abundant 

 in fine sunshiny weather, settling on walls, sand- 

 banks, posts, railings, &c. running with activity, 

 and a vibrating motion of the antennae. Hedy- 

 chrum, Elampus, Chrysis, Cleptes. 



720. Proctrotrupites (Proctrotrupites). Larva 

 inhabits and feeds on the larvae of other insects. 

 Pupa changes in the same situations. Imago witli 

 antennae composed of ten to fifteen joints, elongate 

 in the males, shorter and often clavated in the 

 females ; mandibles somewhat elongate, their ex- 

 tremity generally bifid ; maxillae with the blade 

 dilated, rounded, feelers generally three-jointed ; 

 labium, with its ligula seld6m produced, entire, 

 feelers minute, often exarticulate ; ocelli three ; 

 fore wings with a single principal nervure ; hind 

 wings without nervures ; oviduct of the female 

 tubular and retractile, being simply an elongation 

 of the body. Inhabits grass under trees, &c. 

 during the greater part of the year. Cinetus, 

 Psilus, Proctrotrupes, Platygaster, Teleas, Cera- 

 phron, Sparasion, Dryinus. 



721. Egg parasites (Mymarites}. Larva in- 

 habits and feeds on the eggs of Lepidopterous 

 insects. Pupa changes within the shell of the 

 egg. Imago with the antennae nine- to thirteen- 

 jointed, sometimes twice the length of the body in 

 the 'male, in the female elbowed and clavated; 

 mandibles at the apex tridentate ; the other organs 



