62 



INSECTS OF SAMOA. 



since the female, which is undoubtedly conspecific with it, having all the above 

 differential characters except those of the mandible, is considerably larger. 

 In it the mandible has a sharp tooth near the middle, the head is strongly and 

 subrugosely punctured, with a deep transverse impression on each side in front 

 of the eye, the pronotum is strongly but not densely punctured, with a very 

 narrow smooth median line bordered by larger punctures, and the elytra are 

 very deeply striate, with the intervals still more lightly punctured than in the 

 male. 



60 Aegus tutuilensis, sp. n. (Text-fig. 12). 



Niger, nitidus, ovalis, paulo convexus, capite parum lato, elytris parallelis, 

 apice paulo productis, processu prosternali baud carinato, metasterno antice 



perspicue attenuato : 



capite post oculos utrinque minute 

 dentato, mandibulis plana tis, basi dente 

 subacuto inferiori munito, elytris profunde 

 striatis. 



Long, (mandibulis inclusis) : 22-5 mm. 

 (mandibulis exclusis) 19 mm. 

 Lat. max. 9-9-5 mm. 

 Tutuila, Dec. (Kellers) ; July (Swezey 

 and Wilder). 



Three males of similar development 

 were taken. This species closely resembles 

 A. upoluensis in its general appearance, 

 size, form and sculpture, but differs in the 

 absence of the upper tooth from the man- 

 dible of the male and the greater develop- 

 ment of the lower tooth, which is rather 

 sharp. The anterior half of the mandible 

 is not attenuate, and the tip is very blunt. 

 The front and middle coxae are the same distance apart as in A. upoluensis, 

 and the metasternum has the same form and sculpture. 



The female is unknown, and it is probable that the male reaches a higher 

 degree of development than is represented by the three specimens found. 



Text-fig. 12. — Aegus tutuilensis, 

 sp. nov. 



1 



