352 HYMENOPTEKA. 



longish, deep, semioblique furrow. Suturiform articulation broad, moderately deep, 

 crenulated ; an oblique furrow of half its width runs to the side ; the side also crenu- 

 lated, but not so strongly. Wings longish, smoky, darker at the apex. Thorax 

 rufous ; abdomen of a yellower and lighter tint. 



The group of I. quadkipunctatus. 



Body red, the head, the prosternum, the apex of the abdomen from the fourth 

 segment, and the legs, black ; wings deep fuliginous ; antennce black, longer than the 

 body. Petiole shining, impunctate. Area on the second segment rounded at the 

 base, becoming gradually narrowed to a little beyond the middle, then abruptly nar- 

 rowed, so that the basal half is much wider than the apical half ; on either side of 

 this narrowed part is an elongated fovea ; there is a shallow, narrow depression on 

 either side of the basal part, this depression leading into the lateral one, which is 

 wide and moderately deep. Suturiform articulation smooth, impunctate, not 

 striated. (Species 34.) 



Differs from the group of /. volcanicus in the form of the area on the second seg- 

 ment, and in having two fovese on the petiole. 



^K 34. Iphiaulax quadripunctatus. (Tab. XIV. fig. 25, s .) 



E^fus ; antennis, capite, prosterno, abdominis segmentis 4°-7 m pedibusque, nigris ; alis longis, fuliginosis. $ $ • 

 Long. 13-5 millim. ; terebra 12 millim. 



Eab. Panama, Volcan de Chiriqui 4000 to 6000 feet {Champion). 



Antennae stout, as long as the body ; third joint contracted towards the base, a little 

 longer than the fourth. Head broadly depressed above the antennae; face opaque, 

 shagreened ; sparsely covered with pale hairs. Petiole raised in the middle, the base 

 depressed ; two elongated oval punctures placed side by side in the middle towards the 

 centre ; the inner furrow broad, especially at the apex ; the outer furrow narrower and 

 placed lower down, and with a pair of keels down the centre. Second segment raised 

 in the centre at the base, the raised part becoming narrowed gradually to the apex (it 

 reaches a little beyond the middle of the segment) ; at its apex is an elongated 

 puncture on each side, these being nearly double the length of those on the petiole, 

 but they are not so clearly defined and separated at the base ; along the side is a 

 depression, curved at the base; the suturiform articulation is shining, impunctate, 

 bifurcating in two at the sides, and not very deep in the middle ; there is a narrow 

 transverse groove at the apex of the segment. 



In the male the raised part on the second segment is more acutely pointed at the 

 apex, and narrower generally than in the female ; and the punctures at the apex are 

 not, at the base, separated at all from the lateral depression. 



