264 HYMENOPTEKA. 



a squarish white mark on each side of the third, fourth, and fifth segments, the two on 

 the last becoming confluent at the apex. The pygidium is fringed laterally with long, 

 stout, dark fulvous hair. The second ventral segment is strongly, the other segments 

 more finely and closely, punctured, and fringed with white hairs ; the basal segment is 

 covered with long white hair ; the second segment is covered with silvery hair at the 

 sides, and above there are some black hairs ; the third to the fifth segments bear also 

 black hairs, these segments, too, being infuscated in the middle. The legs are thickly 

 covered with silvery-white hairs; the tibial spines stout, fiery-red, blackish at the 

 apices ; the calcaria pale fulvous ; the tarsal spines fiery-red. 



This species differs from the others of this section in having the abdomen ferruginous 

 instead of black. 



** Abdomen black. (Species 3-10.) 



3. Mutilla rufofemorata. (Tab. XIII. fig. 1, $ .) 



Ferruginea : abdomine nigro, basi rufa, albo-maculata ; antennis nigris ; tibiis tarsisque fuscis. $ . 

 Long. 15 millim. 



Hab. Mexico, Amula in Guerrero 6000 feet (II. H. Smith). 



Head, thorax, coxae, trochanters, and femora red ; the abdomen black, with the base 

 of the first segment reddish, its apex, two broad lines on the base of the second 

 segment, the apex of the latter broadly, a broad continuous line proceeding from it to 

 the last segment, and also the edges of the ventral segments, silvery-white. The head 

 not much wider than the thorax ; above the antennas coarsely punctured ; the antennal 

 plates shining, impunctate, the part between them coarsely punctured ; on either side 

 of them the head is smooth and impunctate, the division from the upper punctured 

 part being indicated by an irregular keel. Clypeus finely punctured. Eyes rather 

 small, oval, net reaching to the top of the head, being placed almost in the middle 

 line ; the head is hardly narrowed behind them. The mandibles are black, reddish in 

 the middle. The scape of the antenna? is piceous towards the base, bearing a few hairs 

 and some large punctures ; the flagellum covered with a pale microscopic down, and 

 tapering perceptibly towards the apex ; the third joint twice the length of the fourth. 

 Thorax quadrate, twice the length of the head ; the base rounded and narrowed, the 

 apex transverse, the sides contracted inwardly ; the middle with a small, but distinct, 

 incision ; the sides roughly crenulated ; on the sides of the median segment near the 

 middle is a distinct tooth ; coarsely punctured, and covered (as is also the head) with 

 silvery hair ; the mesopleurse shining, impunctate, slightly hollowed. The abdomen 

 broader than the thorax; the base (the reddish part) of the first segment oblique, 

 shining, glabrous, and separated from the apical part, which is covered with black 

 pubescence and white hair ; the sides of the second segment coarsely punctured. The 

 pygidium laterally covered with long fuscous hair. The tibia? and tarsi thickly covered 



