ii4 MEMOIRS ON THE COLEOPTERA 



half wider than long, parallel, moderately rounded at the sides, the me- 

 dian line very finely and feebly impressed almost throughout, gradually 

 a little more strongly basally; elytra large, nearly parallel, slightly 

 transverse, two-fifths wider and nearly one-half longer than the pro- 

 thorax; abdomen as in the preceding; mesosternal process longer, 

 more parallel apically than in the preceding, the tip acutely rounded 

 and separated from the less abbreviated and more sharply triangular 

 metasternum by a shorter interval, barely a third the thickness of the 

 middle femora. Length 2.8 mm.; width 0.78 mm. Alaska (without 

 further indication, but probably collected on the mainland near Fort 

 Wrangel) , Wickham. 



This species is evidently allied only to the preceding but differs 

 in its much smaller prothorax, more basally slender antennae, with 

 the joints not quite so elongate throughout and in the longer, 

 less triangular mesosternal process; in relation to the prothorax 

 the head is very much larger than in districta. 



Atheta rurigena n. sp. General facies, coloration and sculpture as in 

 alaskana but less stout and with the punctuation finer, less close and 

 scarcely at all asperulate, indistinct, the minute sculpture of the abdomen 

 also different, being less fine, close or evenly strigilate though in looser 

 and more irregular wavy transverse lines, the vestiture not quite so 

 long or coarse; head large, transverse, four-fifths as wide as the pro- 

 thorax, the eyes large, at two-thirds their length from the base, the tem- 

 pora about equally prominent, straight and parallel for a short distance, 

 then abruptly oblique to the base, the carinse wholly obsolete; antennae 

 long, almost filiform though rather thick, dark piceous in color, the third 

 joint longer than the second, fourth a third longer than wide, all the 

 succeeding joints, including the tenth, mutually subsimilar and very 

 slightly longer than wide, the last slender but scarcely as long as the two 

 preceding; prothorax rather well developed, in form nearly as in the 

 preceding but only two-fifths wider than long, the median line not im- 

 pressed but having a distinct transverse ante-scutellar impression; 

 elytra shorter, rather strongly transverse, not quite parallel, at base 

 slightly though very evidently wider, the suture scarcely a fifth longer, 

 than the prothorax; abdomen almost similar; intermesocoxal parts 

 almost as in alaskana, the drawn out apex of the mesosternum still less 

 acute at tip and the metasternal projection sharply angulate and but 

 little wider than long. Length 2.7 mm.; width 0.65 mm. British 

 Columbia (Yale), Wickham. 



Differs from the preceding species in its more developed prothorax, 

 which is also much less punctate and very differently impressed, 

 in its longer and more filiform antennae, which are thinner apically 

 but thicker basally, in abdominal sculpture and other characters. 

 The type is a female, having the moderately wide apex of the sixth 

 tergite feebly and gradually sinuate medially, with broadly rounded 

 lateral angles. 



