280 Mr. F. Cameron on new 



of the second and third segments ferruginous ; the pnbesence 

 is white, on the apical two segments black ; the pygidium 

 rugosely punctured, with a smooth space, dilated at the base 

 and apex in the middle. The ventral keel with a slight 

 broad curve. The epipygium is smooth at the base; the 

 rest depressed, irregularly rugose, with the sides smooth and 

 raised. The apex of the radius is straight and oblique and 

 distinct from the lower part. The second abdominal segment 

 is punctured, smooth in the centre; above it is gradually 

 rounded. 



Comes near to M. perdita, Cam. 



Mutilla artaxa, sp. n. 



Length 15 mm. 



Hab. Simla. 



This species agrees so closely in form, coloration, and 

 structure with M. inoa that it might be considered identical 

 with it, if it were not for the difference in the form of the 

 ventral keel and of the pygidium. The two may be separated 

 thus : — 



The ventral keel slightly narrowed in the middle ; the 

 smooth space on the pygidium V-shaped (broad at 

 the base, becoming gradually wider towards the apex), 

 narrow, the sides straight inoa. 



The ventral keel broadly projecting downwards at the 

 base, forming a large triangular tooth ; the smooth 

 space on pygidium large, broader at the apex than 

 at the base ; the sides curved inwardly at the base 

 and apex orfa.va, Cam. 



The form of the scutellum is the same, but in artaxa the 

 smooth space is not furrowed ; the basal area on the median 

 segment is the same ; the apical abscissa of the radius is 

 gradually rounded, and does not form two parts, as in inoa. 



Mutilla trebia, sp. n. 



Black ; the basal segment of the abdomen and the second 

 (except at the apex) dark red, the second at the apex covered 

 with black, the third, fourth, and fifth with white pubescence. 

 "Wings fuscous violaceous, the second spgment with an oblique 

 slope on the basal half. 6 . 



Length 15 mm. 



Head rugosely punctured above the antennae ; the front 

 and cheeks thickly covered with long silvery hair ; clypeus 

 smooth and bare. Prothorax rugosely punctured ; the apex 



