AMERICAN HYMENOPTERA. 439 



nervure in middle of brachial cellule. Metanotum completely 

 areolated, the spiracles small, oval, twice longer than wide ; 

 the areola semi-circular ; the lateral areas wider than long, 

 rounded on the inner side, the outer obliquely widened from 

 the apex to the base on the outer side. Antennae short, the 

 base of flagellum narrowed, its basal joints not greatly elon- 

 gated. Clypeus not separated from the face, transverse, with 

 the sides rounded. Parapsidal furrows indicated only on the 

 basal slope. Scutellum large, wider than long, broadly con- 

 vex, the sides not keeled. Abdomen strongly punctured, 

 the first segment with a projection on the sides at the base ; 

 it becomes gradually wider from the base to the apex ; the 

 dorsal keels reach only to the spiracles. 



The radius originates from shortly beyond the middle of 

 the stigma ; the disco-cubital cellule at base more than twice 

 as wide as the second discoidal cellule at apex. Apex of 

 metonotum with three cellules. Abdominal petiole curved, 

 wide at apex. The third joint of flagellum in the d 1 three 

 times longer than wide. Head large. The whole body very 

 shining ; the metonotum strongly punctured. The posterior 

 outer angle of discoidal cellule acutely angled. Scutellar 

 depression not keeled. Tibiae not spinose. Postpetiole 

 punctured in the middle, the sides smooth. The abdomen 

 is longish oval. Antennae without a white ring ; the bullae 

 on recurrent nervure separated. 



Comes nearest to Stiboscopus, in which the areola is as long 

 as broad and pentagonal, in the present genus it having only 

 two angles ; the parallel nervure is received below the mid- 

 dle of the brachial cellule ; according to Ashmead in Slibo- 

 scopus the radius originates from the middle of stigma. In 

 Stiboscopits the legs are called long and slender ; here they 

 are not long and are distinctly stout ; in it, too, the basal 

 area has parallel sides, while with Lausoba its apex is abruptly 

 narrowed. 



23. Lausoba forticeps sp. n. 



Black, smooth and shining, the rnetathorax and abdomen strongly 

 closely punctured, the face, clypeus, mandibles except at the apex, a 

 line on the inner orbits, broadly roundly narrowed on the inner side, 



TRANS. AM. ENT. SOC, XXXV. DECEMBER, 1909. 



