306 HYMENOPTERA. 



stripe on each side from the middle of its base to its lateral 

 margin, where it unites with the marginal band, all of pale yel- 

 lowish-white pubescence ; beneath, the margins of the segments 

 rufo-testaceous, the apical segments fringed with fulvous pu- 

 bescence. 



Hab. Brazil. (Coll. W. W. Saunders, Esq.) 



43. Tetralonia thoracica. 



Female. Length 5 lines. — Black, the pubescence on the 

 vertex and thorax above fulvous, the labrum has a fringe of ful- 

 vous hairs, and the face is thinly clothed with light fulvous ; the 

 pubescence on the legs sooty-black ; the wings fulvo-hyaline and 

 having a fuscous cloud at then apical margins, which also covers 

 the u})per portion of the marginal cell, the nervures and tegulse 

 ferruginous, the latter palest ; the abdomen has a little fulvous 

 pubescence at its base, the third and fourth segments have a 

 very narrow white marginal fascia, the first subinterrupted ; the 

 apical segments have a little fuscous pubescence ; beneath rufo- 

 testaceous, the third and fourth segments having a pale marginal 

 fringe. 



Hab. Brazil. (CoU. W. W. Saunders, Esq.) 



T. unifasciata is very probably the male of this species ; they 

 are from the same locahty. 



44. Tetralonia unifasciata. \ 



Male. Length 4 lines.- — Black, the pubescence on the head, 

 thorax and base of the abdomen fulvo-ochraceous, palest on the 

 face ; on the cheeks and thorax beneath it is griseous ; the 

 femora and tibiae have also a griseous pubescence, that on the 

 tarsi is very pale fulvous ; the clypeus, labrum and mandibles 

 yellow ; the flagellum, except the two basal joints, fulvous 

 beneath ; the wings subhyaline, faintly clouded at their apical 

 margins, the nervures ferruginous, the tegulaj pale ferruginous, 

 as well as the apical joints of the tarsi. Abdomen, a fascia of 

 silvery-white pubescence on the basal margin of the second seg- 

 ment ; the following segments have on their apical margins 

 laterally a little short white pubescence, frequently obliterated ; 

 the apex slightly fulvous, the apical segment having on each side 

 a minute tooth. 



Hab. Brazil. (Coll. W. W. Saunders, Esq.) 



45. Tetralonia sexcincta. 



Macrocera sexcincta, St. Farg. Hym. ii. 99. 12 ? . 

 Hab. Brazil. 



