and Characters of undescribed Species. 353 



Female, — Black. Head and thorax minutely punctured. Face 

 very oblique. Antennas thick, filiform, shorter than the thorax, 

 Thorax with the usual structure; scutellum minutely bidentate. 

 Petiole extremely short. Abdomen fusiform, slightly compressed, 

 longer and narrower than the thorax, very acute at the tip. Legs 

 pale yellow; coxee black; anterior femora black above, except 

 towards the tips; hind-coxae yellow beneath; hind-femora black, 

 much incrassated, yellow at the base and at the tips, armed 

 beneath with one large, and with several small teeth ; hind-tibise 

 with a broad black band. Wings cinereous; veins black; ulna 

 full half the length of the humerus; radius and cubitus very 

 short. 



Length of the body 3 lines; of the wings 5 lines. 



Santarem. Discovered by Mr. Bates. In the British 

 Museum. 



Chalcis separata. 



Foem. — Nigra; caput et thorax subtilissime punctata; antennae 

 sub-clavatae, scapo flavo ; scutellum inerme ; petiolus 

 brevissimus ; abdomen basi ovatum, apice longissime 

 stylatum ; pedes flavi ; coxis nigris, feraoribus anteri- 

 oribus basi piceis, femoribus posticis nigris dentatis valdfe 

 incrassatis apice flavis, tibiis posticis piceo notatis ; alae 

 sub-cinereae. 

 Female. — Black, smooth, shining. Head and thorax very 

 minutely punctured. Antennae sub-clavate, shorter than the 

 thorax ; scape yellow. Thorax with the usual structure ; 

 scutellum unarmed. Petiole extremely short. Abdomen with 

 the basal part oval, a little longer than the thorax; apical part 

 compressed, slender, stylate, of equal depth except at the base, as 

 long as the preceding part of the body. Legs yellow; coxae black ; 

 anterior femora piceous at the base ; hind-femora black, much in- 

 crassated, yellow towards the tips, armed beneath with very 

 minute teeth; hind-tibiae with a piceous mark in the middle. 

 Wings slightly cinereous; veins black; ulna more than half the 

 length of the humerus; radius and cubitus extremely short. 

 Length of the body 5 lines; of the wings 5 lines. 

 Ega. Discovered by Mr. Bates. In the British Museum. 



Chalcis concitator. 



Mas. — Nigra, crassa ; caput et thorax sub-punctata ; antennae 

 filiformes, thorace paullo breviores ; thorax callis flavis, 

 scutello bidentato, metathorace scabro ; abdomen ellipiicum. 



