Hymenopter'a. 157 



Megalommum Jlavomaculatum, sp. no v. 



Testaceous : antennae, mesonotum, except for a yellow mark, 

 with straight base and sides on the apical two-thirds, scutellum, 

 middle of metanotnm, lower part of propleurae, mesopleura?, 

 except for a triangular yellow mark below the tegulae, mesosternum 

 and the greater part of metapleurae, black. Wings hyaline to near 

 the stigma, whei'e there is an irregular cloud on both sides of the 

 transverse basal nervure ; a fuscous mark in the centre of the 2nd 

 discoidal cellule, one beyond it and the apex from the commence- 

 ment of the radius ; nervures and stigma yellow ; the parastigma, 

 apex and base of stigma black. 



Length 9, terebra 3 mm. 



Face coriaceous ; the rest smooth and shining ; the vertex 

 more of a paler yellow colour than the face ; tips of mandibles 

 black. Malar space as long as the pedicle of antennae. Eyes large, 

 distinctly incised on the inner side opposite the antennae. Temples 

 roundly narrowed, short. Abdomen smooth, as long as the head 

 and thorax united ; 1st segment nearly as long as the 2nd and 

 3rd united ; it becomes gradually wider to the apex ; the plate on 

 the 2nd segment is large, triangular, its apex produced to near the 

 apex ; the parts surrounding it are depressed and striated stoutlj' ; 

 suturiform articulation crenulated; it is the only furrow. Wings 

 long ; the radius is curved downwards at the base and upwards at 

 the apex ; the apical abscissa is longer than the basal two united ; 

 2nd discoidal cellule large, longer than wide, transverse at base, 

 rounded at apex ; the cubitus is roundly curved at the base ; the 

 recurrent nervure is received in the apex of the 1st cubital cellule, 



Xanthomicrodus, gen. nov. 



Inner spur of hind tibiae reaching beyond middle of meta- 

 tarsus. First cubital and discoidal cellules confluent ; areolet 

 triangular, the basal nervure straight, oblique, the outer roundly 

 curved, and without a stump of a nervure ; subdiscoidal nervure 

 in hind wings originating at the middle of discoidal nervure, 

 where there is a completely closed basal cellule ; this, with the 

 praebrachial nervure, being the only transverse nervure ; the 

 radius and cubitus extend to the apex of the wing : the transverse 

 basal and anal nervure in fore wings interstitial. Parapsidal 

 furrows distinct; uniting at the apex of mesonotum. Scutellums 

 keeled laterally. Median segment regularly areolated. Claws 

 simple. Malar space moderately large ; apical tooth of mandibles 



