392 HYMENOPTEEA. 



segment is rufous towards the apex and is densely covered with long white hair. The 

 underside of the petiole is ferruginous, sparsely covered with long white hair ; the 

 centre is keeled, the sides grooved. The second ventral segment is black, very shining, 

 impunctate, sparsely covered with long white hair ; the other ventral segments are also 

 black and more closely covered with longer white hair; the apex of the terminal 

 segment is depressed in the middle. The legs are black, covered with long white hair, 

 the tarsal joints piceous towards their apices ; the long spur of the calcaria reaches 

 beyond the middle of the metatarsus. The radial cellule is more than twice the length 

 of the stigma ; the radius is slightly oblique at the base, rounded at the apex ; the 

 radial nervure commences at the middle of the stigma; the first cubital cellule is 

 acutely pointed at the base; the first (and only) recurrent nervure is received very 

 shortly in front of the middle of the cellule. 



147. Sphaerophthalma facilis. 



Long. 10 millim. c? • 



Hah. Mexico, Northern Sonora (Morrison), 



The head slightly narrower than the thorax, rounded behind, developed there nearly 

 the length of the eyes, rather thickly covered with long, pale fuscous, soft hair ; shining, 

 almost impunctate ; the ocelli in a black patch, the hinder pair surrounded by a 

 furrow ; the mandibles at the base bearing long white hair, the tips black. The 

 antennae are a little longer than the head and thorax united ; the basal two joints clear 

 testaceous ; the flagellum fuscous, paler and more testaceous in tint on the lower side, 

 covered with a very fine down and hardly tapering towards the apex ; the third joint 

 slightly longer than the fourth and shorter than the first, which is a little curved and 

 sparsely covered vdth fuscous hair. The thorax is densely covered all over with long 

 pale hair ; the mesonotum is sparsely, the scutellum more strongly punctured ; the 

 lateral furrows on the mesonotum are distinct, moderately wide and deep, and reach to 

 the scutellum, which is not much narrowed towards the apex. The median segment 

 has a gradually rounded slope and has the hair longer than on the mesonotum ; it is 

 reticulated ; the basal central area is large, narrowed in front, broad and transverse at 

 the apex, and with an indistinct keel inside. The hair on the pleurse is long and white. 

 The propleurse rugose ; the mesopleurse impunctate at the base, the remainder coarsely 

 punctured, running into reticulations ; the metapleursc hollowed, smooth, and impunc- 

 tate at the base, the rest reticulated. The petiole is nearly as long as the second 

 abdominal segment, narrow at the base, gradually dilated to the apex ; coarsely punc- 

 tured, sparsely covered with long white hair. The second and following abdominal 

 segments shining, impunctate, covered with long pale hair; the apices of the segments 

 fringed with depressed glistening white hair ; the pygidial area covered with long white 

 hair. The ventral segments covered with long white hair, impunctate, except the petiole, 



