276 HYMENOPTEBA. 



the apex, bearing pale hairs, the sides and apex with a band of white pubescence. The 

 second segment alutaceous, without distinct punctures, except at the sides ; above 

 rather thickly covered with black hair ; the sides have the hairs silvery ; at the base 

 are two white lines, which reach to the middle ; the apex and sides have a white band 

 dilated in the middle. The base of the third segment has a finely punctured band ; 

 the rest of it, as are also the other segments, alutaceous, and with a white band on the 

 sides and blackish hair. The pygidium is punctured, and fringed laterally with long 

 fulvous hair. The ventral segments are fringed with white hair. The femora and 

 tibiae are sparsely covered with white hair ; the tibial spines slender, sharp, and pale 

 fulvous ; the tarsi thickly covered with white hair, the spines fulvous. 



A variety % ( ? ), from Caldera, Panama (Champion) (fig. 7), has the white line on 

 the second abdominal segment continued to the white band on the apex ; and the apex 

 of the first antennal joint, and also the third joint beneath, reddish. 



M. porcata is identical in coloration with M. hogei, except that the legs have no 

 red, being entirely black, differing otherwise in the head behind the eyes being sharply 

 and obliquely narrowed (in M. hogei it is only very slightly narrowed, and not at 

 all obliquely) ; the head wider, as compared with the width of the thorax ; the thorax 

 laterally not concave, becoming wider towards the apex, and more thickly covered 

 with black (instead of pale) hair ; the median segment at the top more broadly rounded ; 

 and the spines on the tibiae narrower, sharper, and longer. 



c. Head, thorax, and abdomen black. (Species 20.) 

 20. Mutilla gaumeri. (Tab, XIII. fig. 12, $ .) 



Nigra ; capite aureo-hirto, abdomine fulvo-maeulato. 

 Long. 10 millim. 



Rab. Mexico, North Yucatan (Gaumer). 



Black ; the vertex and front covered with a fulvous pubescence ; the apex of the first 

 segment, two oval maculae on the base of the second segment, the apex of the latter 

 broadly, and the sides of the other segments covered with golden-fulvous pubescence. 

 Head coarsely punctured, narrower than the thorax, retreating sharply behind the eyes, 

 which are large and reach nearly to the top ; the base of the mandibles ferruginous. 

 The scape of the antennae punctured, and bearing rather long fulvous hair; the 

 flagellum almost glabrous, ferruginous beneath. Thorax short, about twice the length 

 of the head, not much dilated towards the apex, convex above, the slope at the base 

 and apex rather abrupt ; coarsely punctured, except the pleurae, which are smooth ; 

 the sides are rough from the punctures, but otherwise are not tuberculate or incised ; 

 on the median segment the punctures are larger, more irregular, and almost form 

 reticulations. There is no pubescence on the thorax, but it bears black or fuscous 

 hair. The abdomen is longer and somewhat wider than the thorax. The first segment 



