64 MEMOIRS ON THE COLEOPTERA 



they are inserted at the extreme sides and front of the head and at 

 only a slight distance before the eyes, which are large, rather 

 convex, evenly oval and shorter than wide. The male is smaller 

 and narrower than the female. 



Of this anomalous genus there seem to be five species and a few 

 subspecies in my collection, which may be described as follows: 



Elytra even in surface or with but feeble traces of inequality, evenly 



punctured 2 



Elytra with irregular indentations, which for the most part assume a 

 linear arrangement, the indentations having some punctures irregu- 

 larly placed which are slightly larger than the regular punctuation. . 4 

 2 Color always pale castaneous; form oval, shining; head well developed, 

 not coarsely, evenly punctate, the eyes prominent; antennae very 

 long and slender, almost perfectly filiform, pale ochreous, the pen- 

 ultimate joint much elongated, the second shortest, one-half as long 

 as the third as usual, the latter longer than any of the succeeding 

 joints except the last; prothorax convex, scarcely twice as wide as 

 long, the sides moderately converging and feebly, very evenly arcuate 

 from base to apex, the punctures fine, separated by two to four times 

 their diameters, barely at all stronger or closer laterally; elytra a little 

 more than a fourth longer than wide, widest at about the middle, 

 where they are nearly one-half wider than the prothorax, the sides 

 parallel and very evenly rounded, very obtusely and broadly rounded 

 at apex, the punctures like those of the pronotum though a little 

 larger and more indefinitely impressed as a rule; under surface 

 shining, glabrous, finely, sparsely punctured, the metasternum more 

 coarsely and closely laterad. Length (cf , 9 ) 7.7-9.0 mm. ; width 4.7- 

 5.5 mm. California (northern coast regions). Abundant. [Am- 

 phicyrta chrysomelina Er., Germ. Zeitschr., IV, 1843, p. 40]. 



chrysomelina Erichs. 



A Similar to the preceding but more elongate and more oblong, the 

 head similar, the antennae even a little longer, extending still further 

 behind the base of the elytra; prothorax somewhat wider, more 

 than twice as wide as long, the similarly arcuate sides rather more 

 strongly converging from base to apex, punctured as in chrysome- 

 lina, the scutellum a little larger, acutely ogival, closely punctate; 

 elytra more elongate and more oblong, at the middle barely two- 

 fifths wider than the prothorax, the sides parallel and nearly 

 straight, rounding gradually basally and apically, the apex still 

 more broadly rounded, similarly punctured. Length (9) 9-3 

 mm.; width 5.6 mm. California (coast regions north of San Fran- 

 cisco) oblonga n. subsp. 



B Similar to chrysomelina but smaller and with a notably smaller 

 head, the antennae more brownish and with the joints not quite so 

 elongate, the penultimate (cf) not quite one-half longer than 

 wide; prothorax formed nearly as in oblonga, rather more than 

 twice as wide as long; elytra as in chrysomelina but less greatly 



