BLENNOCAMPA. 33 



The antennae are shorter than the head and thorax, moderately stout ; third joint dis- 

 tinctly thickened at the apex, and half as long as the fourth. Clypeus almost transverse ; 

 the sutures on the vertex are deep at the sides of the ocelli, broader and shallower below 

 them ; the front is roughly blistered, so that the ridges of the frontal area are almost 

 obscured ; the broad sutures of the vertex end in a ridge, which curves round the 

 antennae and goes round its inner side ; the frontal foveae are not well marked ; the 

 lateral is represented above the above-mentioned ridge by a small tubercle ; the central is 

 not visible at all, but between the antennae is a large rounded tubercle surrounded by 

 a furrow. The transverse radial nervure is received in the apical sixth of the cellule, 

 the transverse median in front of the middle ; the third cubital cellule is longer than the 

 second by one third, is narrow at the base, much widened at the apex. There is a bulla 

 on the transverse radial and first transverse cubital ; and a double spurious vein goes 

 through the cubital and discoidal cellules ; and there is a single one in the first radial. 

 The legs are stout, the tibiae grooved on the inner side, the tarsi shorter than the tibiae, 

 the metatarsus shorter than the succeeding joints ; the claws subbifid. The abdomen 

 is longer than the head and thorax, its apex pilose, as are also the cerci and apex of 

 the sheath. The head is only very slightly developed behind the eyes. 



The male has the front smoother, not so blistered, the third cubital cellule shorter. 



6. Blennocampa alpina. 



Nigra, antennis crassis, fere glabris, genibus tibiisque anticis sordide testaceis ; alis fuscis, cellula cubitali 



3 a fere breviore quam 2\ 

 Long, fere 7 millim. 



Hab. Mexico, Ciudad in Durango 8100 feet (Forrer). 



The antennae are a little longer than the head and thorax, the third joint a little 

 longer than the fourth, the rest to the penultimate becoming gradually shorter, but 

 scarcely thinner ; the ninth longer than the eighth. The head projects behind the eyes, 

 close to which there is a narrow suture. The sutures on the vertex are deep, if narrow ; 

 frontal area moderately well defined, the apical edges angled, the middle straight. 

 Central fovea large, longer than broad ; lateral ones indistinct. Clypeus with shallow 

 punctures, the apex scarcely transverse ; tips of mandibles piceous. The transverse 

 radial nervure is received a very little beyond the middle of cellule ; transverse median 

 a little in front of the middle ; the third cellule is a little shorter and wider than the 

 second, which bears a distinct horny point ; there is a bulla in the first transverse 

 cubital nervure ; the abdomen is not much longer than the head and thorax, the sheath 

 projecting, large, slightly pilose. Claws simple ; tarsi shorter than the tibiae. The 

 legs are covered with a greyish pile. 



Readily known from all the other Neotropical species by the head being broadly 

 developed and projecting behind the eyes, and by the punctured clypeus. The shape of 

 the head is characteristic of northern forms. 



biol. centr.-ameb., Hymenopt., July 1883. ff 



