376 HYMENOPTEEA. 



Very like the preceding species, but longer and broader ; the antennae stouter ; the 

 face more strongly punctured ; the front above the antennae not so deeply depressed, 

 the depression not so distinctly margined at the top, nor so clearly divided into two by 

 the furrow ; the metanotum shorter, and with a much steeper slope. The petiole is 

 broader compared with its length, more perpendicular, and not so much on a line with 

 the rest of the abdomen; its centre more strongly punctured; the inner furrow 

 narrower and deeper, the outer furrow longer and continued to the base (not originating 

 from the apex as in I. jucundus, but a little from the middle). The abdomen longer 

 compared with the thorax, but otherwise as in /. jucundus, except that the punctuation 

 is stronger. The four anterior legs are black, their joints red; the hinder pair have 

 the apices of the femora, the tibiae, and the tarsi, black, the rest red. The vertex is 

 broadly obscured with black, the black running into the red ; the mesonotum in front 

 is obscure black. 



iii. Abdomen strongly striated. (Species 69.) 



The group of I. mendicus. 



Abdomen closely and regularly longitudinally striated, the second segment more irre- 

 gularly and more strongly so ; the petiole strongly reticulated ; the area shining, 

 impunctate, broader than long ; the lateral depression shallow, strongly striated ; the 

 suturiform articulation shallow, striated, the strice continuous, the lateral branches 

 not clearly defined; the segments shining, and not striated at their apices, the 

 latter each higher than the base of the succeeding segment. Head and legs black ; 

 the body and thorax obscure red, greatly suffused with black. (Species 69.) 



69. Iphiaulax mendicus. (Tab. XV. fig. 8, $ .) 



Capite, antennis, palpis pedibusque nigris, thorace ferrugineo, abdomine fuseo-rufo, orbitis oculorum testa- 



ceis ; alis fuliginosis. $ . 

 Long. 8 millim. ; terebra 3 millim. 



Hab. Mexico, Northern Sonora (Morrison). 



Antennae microscopically pilose, the joints not clearly separated ; basal joint thick, 

 not much more than double the length of the second. Head shining, impunctate, 

 covered sparsely with rather long hair ; black above, whitish in the face ; ' mandibles 

 testaceous, blackish at the tips. Mesonotal lobes well developed ; metanotum short, 

 with a gradual oblique slope to the apex, the sides covered with long white hair. 

 Petiole with the central part rugose and sharply rounded at the apex, the latter 

 impunctate ; the inner furrow broad, deep, transversely striolated. The area on the 

 second segment and the sides behind the oblique depression shining, impunctate. The 

 second, third, and fourth segments, except at their apices, strongly longitudinally 

 striolated ; the apical segment black. The wings have a violet tinge ; the recurrent 



