: 



390 HYMENOPT^KA. 



Antennae 47-jointed, densely microscopically pilose, distinctly tapering towards the 

 apex. Head finely punctured, sparsely covered with glistening white hair ; palpi long, 

 pilose. Thorax above closely and finely punctured, covered with scattered pale hair ; 

 metanotum somewhat rugose. Abdomen not much longer than the head and thorax 

 united; closely longitudinally punctured, the apical segment not nearly so strongly 

 punctured as the basal one ; the basal three segments becoming gradually, but only mode- 

 rately, dilated; a depression on the centre of segments 4-6 in the middle, that on 

 the fourth being the smallest and deepest ; a narrow keel in the centre of the first and 

 second segments, that on the first cleft at the extreme base, that on the second origi- 

 nating from a small, shining, triangular field ; an indistinct keel at the base of the third 

 segment. Legs pilose ; coxae punctured ; hind tarsi inclining to fuscous. The recur- 

 rent nervure is scarcely interstitial ; the transverse humeral nervure received not very 

 far from the transverse basal nervure ; the second cubital cellule a little shorter than 

 the first ; the second transverse cubital nervure straight and largely bullated. 



b. Eyes very slightly incised, not reaching to the base of the mandibles. 



£3. Rhogas sonorensis. (Tab. XVI. fig. l, jy 

 us, punctulatus, pedibus paUide testaceis ; alis hyalinis, stigmate fusco cum basi et apice albis. $ . 

 Long. 5 millim. 



Eab. Mexico, Northern Sonora (Morrison). 



Antennae a little longer than the body, 32-jointed, scarcely pilose, fuscous towards the 

 apex, striated. Thorax (especially laterally) clothed with whitish hair ; metanotum 

 with a transverse keel at the base, a keel down the centre, and also one down either 

 side. Abdomen not much longer than the head and thorax united, closely longitudinally 

 striated ; the first and second segments keeled down the centre. The transverse humeral 

 nervure is received in the basal third of the first discoidal cellule ; the recurrent nervure 

 is nearly interstitial ; the second cubital cellule shorter than the first ; the second 

 transverse cubital nervure nearly obliterated. 



B. Middle joints of the palpi dilated. 



The following two species probably do not belong to Bhogas, from the typical species 

 of which they differ in having the joints of the palpi considerably enlarged and dilated. 

 Pelecystoma, Wesm. (a genus nearly allied to Bhogas), has the third joint of the maxil- 

 lary palpus dilated on the inner side and securiform ; but in the species here described 

 the three middle joints of the maxillary and the third joint of the labial palpi are 

 enlarged, but scarcely so much as in Pelecystoma. The eyes are incised on the inner 

 side, are large, and reach a little below the base of the clypeus. The antennae are longer 

 than the body, especially in the male, and are about 50-jointed. The lobes of the meso- 



