306 HYMENOPTEKA. 



lighter coloured than the others; and in the first and second cubital cellules runs a 

 white line, there being also two white lines in the third cellule. 



Characteristic of this species are the tuberculate edges of the pronotum, the strongly 

 gibbose scutellum, the large tegulae, and the tooth on the apex of the median segment. 



f f The scutellum not gibbous ; the median segment not tuberculate in the middle. 



(Species 54-62.) 



% The abdominal segments 3-6 clothed with golden pubescence. 

 (Species 54 and 55.) 



1 (2). The median segment thickly covered all over with a dense silvery pubes- 

 cence, and with a stout tubercle in the middle; the wings extending beyond 

 the apex of the abdomen pomona. 



2(1). The median segment with silvery pubescence at the base only, and without 



a distinct tubercle ; the wings not extending to the apex of the abdomen . megara. 

 I 



n 54. Mutilla pomona. (Tab. XIII. fig. 29, a .) 



Long. 12 millim. S • 



Hob. Mexico, Dos Arroyos and Rio Papagaio, both in Guerrero (H. H. Smith), 

 Temax in North Yucatan (Gaumer). 



Head and thorax densely covered with a longish griseous pubescence. The head a 

 little narrower than the thorax, the sculpture hidden by the pubescence ; the mandibles 

 punctured, ferruginous before the apex. The eyes large, the head roundly narrowed 

 behind them. The pronotum apparently punctured, the punctuation hidden by the 

 dense pubescence ; the mesonotum with large, deep, irregular punctures, and with two 

 short lurrows on either side, the inner one irregular. The scutellum broadly convex, 

 strongly punctured. The median segment with the upper half oblique, the lower half 

 semiperpendicular ; the sides, looked at from above, bulging out obliquely and with a 

 bluntly conical tooth at the base above ; strongly punctured and very densely pilose. 

 The mesopleurse rather strongly punctured and densely pilose ; the metapleuree still 

 more strongly punctured, but only sparsely pilose. The first segment of the abdomen 

 wider than long, not dilated towards the apex, depressed at the base, covered with long 

 griseous hair. The second segment shining, the base and sides with depressed pale 

 fulvous hairs ; the apex broadly, and all the following segments densely, covered with 

 fulvous hair. The pygidium punctured at the base. The first ventral segment keeled 

 all down ; the second strongly punctured ; the other segments punctured in the middle 

 and sparsely pilose. The hypopygium pale yellow and covered with long pale hairs. 

 The legs densely covered with pale hair ; the calcaria white. The basal abscissa of the 

 radius is oblique, and is about one fourth longer than the apical abscissa, which is 

 curved ; the second cubital cellule at the top is about the length of the space bounded 

 by the first recurrent and the second transverse cubital nervures ; the third cellule at the 



