AMARIN.E 295 



intervals not differing much, except in lustre, in the two sexes, but 

 varying from perfectly flat to notably convex; hind tarsi long, 

 rather stout in the male type, which has perfectly flat strial inter- 

 vals, but distinctly more slender in all the other examples of both 

 sexes. Length (cf) 8.0-9.5, (9) 9.5-10.0 mm.; width (cf) 3.6-4.0, 

 (9 ) 4.3-4.4 mm. California (San Diego) tarsalis n. sp. 



4 Prothorax very slightly wider behind the middle than at base, stout, 

 convex, rather shining, the elytra alutaceous in the female, black, 

 with feeble obscure bronze lustre; under surface black, the legs and 

 epipleura rufous; head well developed, rather more than half as 

 wide as the prothorax, the eyes rather feebly convex; antennae mod- 

 erate in length; prothorax three-fifths wider than long, the sides 

 subevenly and distinctly arcuate from the obtuse and somewhat 

 blunt basal angles to the apex, which is broad, feebly sinuate and 

 with broadly blunt angles; impressions obsolete or nearly so; foveal 

 region usually punctureless, sometimes with a few fine feeble punc- 

 tures at the inner fovea, which is distinct and linear, the outer small, 

 rounded, sometimes nearly obsolete; elytra barely more than a third 

 longer than wide, in the female, and slightly wider than the protho- 

 rax, broadly but somewhat gradually ogival behind; striae fine but 

 sharp, impunctate, the scutellar long, oblique; lateral series very 

 remotely spaced medially; intervals flat, feebly convex on the decliv- 

 ity. Length (9) 9.4-10.0 mm.; width 4.4-5.0 mm. California 

 (Island of San Clemente). Six examples insularis Horn 



Prothorax widest at base, with oblique and feebly, evenly arcuate sides 

 thence to the apex; body rather less stout, similar in coloration and 

 lustre, the elytra feebly alutaceous, the legs and epipleura more ob- 

 scurely rufous; head and antennae nearly similar, the former dis- 

 tinctly more than half as wide as the prothorax, the eyes only feebly 

 convex; prothorax shorter and three-fourths wider than long; basal 

 angles obtusely rounded; apex narrower and more sinuate, not quite 

 three-fourths as wide as the base, the angles similarly blunt at apex; 

 surface similar, the outer fovea more postero-laterally oblique; ely- 

 tra narrower and more elongate, nearly one-half longer than wide in 

 the female, otherwise almost similar in outline, less evidently wider 

 than the prothorax; striae still finer, extremely tenuous, almost obso- 

 lete externally and minutely broken or comminuted, the scutellar 

 similar but much finer; lateral line of punctures broadly interrupted 

 medially; intervals perfectly flat throughout, not differing on the 

 declivity. Length (9) 10.0 mm.; width 4.4 mm. California (Is- 

 land of Guadalupe) guadalupensis n. sp. 



The remarkable variations observable, even with the limited 

 material at hand, in the insignis group, would seem to imply a 

 mixture of some closely allied forms, and perhaps the names of 

 Motschulsky will prove to be valid, subspecifically at least. The 

 females of insignis may have sensibly convex and rather shining to 

 perfectly flat and subopaque intervals, and, although when present 



