126 Mr. Cameron on 



concave, rough, hardly dilated towards the apex. Meso- 

 pleurae shining, impunctate in the middle, the metapleurae 

 the same except at the apex. Median segment rounded, 

 and with a very slight slope. Abdomen as long as the head 

 and thorax united ; subpetiolate ; less strongly punctured 

 than the thorax ; the hairs at the base black, at apex pale ; 

 the ventral segments fringed with long silvery hair ; 

 pvgidium longitudinally striated, rufous in the centre. 

 Legs bearing whitish hairs : the calcaria pale ; the tibial 

 spurs thick and of four pairs. Mandibles piceous at the 

 base. 



Length, 7 mm. 



M. rufitarsis, Sm., appears to have pretty much the 

 same colouration and markings as the above, but it is 

 larger (4.3^ lines). 



MUTILLA TRIMACULATA, Sp. 110V. 



Black, the thorax dark rufo-testaceous, a round mark on 

 the base and apex of the second segment, and a larger 

 longish one on the fourth, glistening white. Antennae stout, 

 the flagellum dull brownish beneath, the scape obscure 

 rufo-testaceous, the third joint clearly longer than the fourth. 

 Head as wide as the thorax, rather strongly punctured ; 

 covered with long blackish hairs ; antennal tubercles 

 shining, dull rufo-testaceous, this being also the colour of 

 the mandibles at the apex. Thorax somewhat more 

 strongly punctured than the head; the pleurae impunctate; 

 the sides of the thorax above straight, becoming slightly, 

 but distinctly, narrowed from base to apex ; the median 

 segment with a rather sharply rounded slope. Abdomen 

 not much longer than the head and thorax united, the 

 pvgidium shining, finely punctured. The ventral segments 

 and pleurae dull piceous, the thorax and abdomen bearing 

 long blackish hairs; the apical ventral segments fringed 

 with whitish hairs ; the legs bear white hairs ; the fore 



