2/8 HYMENOPTERA. 



cence, subhyaline towards their base ; sometimes a spot of blue 

 pubescence on the scutelkim at its notch in the middle. Abdo- 

 men, a large subquadrate spot on each side at the base, emitting 

 a short line from its apex within ; the four following segments 

 have on each side a broad line of blue pubescence; beneath, 

 the second, third, and sometimes the fourth segments have a 

 small spot on each side of similar pubescence. 



Hab. Port Natal. 



Genus 32. LIOGASTRA. 



Liogastra, Perty, Delec. Anim. Art, p. 146. 

 Rathymus, St. Farg. Hym. ii. 539. 



The labial palpi four-jointed ; the first joint about the same 

 length as the mentum, the second joint rather more than half 

 the length of the first ; the two apical joints minute, placed at 

 the side of the second joint nearly at its apex. The maxillary 

 palpi obsolete ; the mentum half the length of the labium ; the 

 paraglossfe short, acute at their apex, narrowed at their base. 

 The superior wings having one marginal and three submarginal 

 cells ; the former as long as the three latter, rounded at its apex ; 

 the first submarginal cell a little longer than the second ; the 

 second and third of about equal length, the latter narrowed con- 

 siderably towards the marginal ; the two recurrent nervures 

 uniting with the second and third transverse cubital nervtu'es ; the 

 antennas filiform, the scape short, much narrowed at the base, the 

 ocelli placed in a slight curve on the vertex ; the calcaria and 

 claws of the tarsi simple. 



1. LlOGASTRA BICOLOR. B.M. 



Liogastra bicolor, Perty, Del. An. Art. p. 147. t. 28. f. 7. 

 Rathymus bicolor, St. Farg. Hym. ii. 540. 1. 



Hab. Brazil. 



2. Liogastra unicolor. B.M. 



Female. Length 8 lines. — Ferruginous, antennae black, ex- 

 cept the scape and two basal joints of the flagellum, which are 

 ferruginous ; the face, margin of the vertex and legs have a 

 changeable golden pubescence ; the collar and sides of the meta- 

 thorax have a line of white pubescence; the scutellum elevated, 

 bituberculate ; the intermediate tibia? at their apex above pro- 

 duced into a short acute spine; wings dark fuscous, having a 

 violet iridescence ; the legs of a paler red than the body. 



Hab. Brazil (Para). (H. W. Bates.) 



