396 Descriptive Catalogue [1898. 



longer than broad, very little attenuate at base, shoulders dentate, 

 dorsal sulcus wide, reaching the middle ; first dorsal segment equal 

 to the following one, the impression at base narrow. Metasternum 

 convex. Length 1-70 mm. 



This species resembles R. riigosula, but differs by the absence of 

 punctures, the head is much shorter and the cephalic foveae are 

 free and not connected by sulci ; the longitudinal sulcus on the 

 prothorax is exceedingly faint and may prove to be missing in other 

 examples. The male is unknown. 



Hab. Port Ehzabeth. 



Found with Bhojjlaomyrmex transversinodis, Mayr., in litt., a new 

 genus of ant. 



Eaffkayi dilatata, 

 Plate XVIII., fig. 1. 



Elongate and sub-parallel, more or less darkly piceous-brown, 

 with the elytra brownish red or dark chestnut ; antennge and legs 

 rufous, pubescence small and thin ; head hardly longer than broad, 

 attenuate in front, rounded behind the eyes, two small foveae and 

 two sulci converging in a median depression of the front, a very 

 faint cannula close to the neck ; antennae slender, a little clavate, 

 first joint somewhat short, second quadrate, following ones a trifle 

 smaller, third to seventh quadrate, diminishing, however, in length, 

 eighth a little smaller and transverse, ninth and tenth a little larger 

 and transverse, eleventh larger, ovate, abruptly acuminate; prothorax 

 more than twice wider than the head, a little broader than the 

 elytra, transverse rounded and dilated on the sides, much narrowed 

 behind, transverse sulcus deep, angular and widened in the middle, 

 a faint longitudinal depression on each side and a trace of a median 

 one, base itself with four grooves and a short median carinule ; elytra 

 much longer than the prothorax, sides a little rounded, shoulders 

 oblique, well marked and dentate, dorsal stria a little arcuate termi- 

 nating at the middle ; first dorsal segment of the abdomen not larger 

 than the following one with two strong, divergent carinae, including 

 nearly the third part of the disk ; metasternum convex ; trochanters 

 simple ; fourth ventral segment very transversely depressed, its 

 apical margin sharp, sub-carinate, and provided on each side with 

 a long, thin and recurved spine ; last one large, thickly clothed on 

 the sides with a golden pubescence, glabrous and depressed in the 

 middle. Male. Length 2-00 mm. 



A very curious species which differs from all the others by its 



