18 Journal New York Entomological Society. l^oi. vii. 



Habitat : A rather common species west of the California Sierras 

 nearly throughout the length of the state. 

 A. quadriseriata, sp. nov. 



Form cylindro-conic, feebly depressed, piceous, somewhat bronzed, clothed with 

 fine erecft blackish hairs. Head with fine vertical carina, punctures large, shallow, 

 closely placed. Thorax twice as wide as long, widest at basal third, where the sides 

 are strongly rounded, apex much narrower than base ; surface not very closely punc- 

 tate on the disk, more densely at sides ; median and basal impressions rather feeble, 

 lateral margin inferior posteriorly. Elytra wider than the thorax, sides sinuately nar- 

 rowed to apical third, thence more rapidly to apex ; punctures of striae rather fine, in- 

 tervals flat except at sides, uniseriately punctulate ; each elytron marked with two 

 longitudinal series of four or five elongate yellow spots, one discal the other lateral. 

 Beneath more plainly bronzed, sparsely clothed with pale hairs ; abdomen rather finely 

 and sparsely punctate, last ventral with thick apical carina, the free edge more or less 

 uneven and narrowly rounded. Length, 5.5-7 mm., .22-. 28 inch. 



Habitat : Twelve examples are before me, all from southern Cali- 

 fornia (Los Angeles and Santa Barbara Counties). 



The present species well illustrates the inexactness of the form of 

 the prosternum as a basis for a natural group division. The form is here 

 a little variable and may be nearly paralleled in any one of the three 

 larger groups — Sinuatte, Emarginata^ or Truncate. A strict interpre- 

 tation would exclude it from the last, and I believe it may best be as- 

 signed to the Sinuatce. It re.sembles very closely in color certain small 

 fonns of acuta, but is more pointed behind and with very different last 

 ventral. The maculation is quite constant so far as seen. 



ACM.EODER.E EmARGINAT-^. 



Attention has already been called to the fact that the front margin 

 of the prosternum in this series is usually in some faint degree trisinuate, 

 and when this is more pronounced than usual, as it is likely to be in 

 individuals of almost any species, a survey of both groups may be 

 necessary for identification. 



I have removed viariposa from the Truncate and placed it in the 

 present series next to doiirni, with which it is very closely allied, if not 

 actually identical. This course is justified by an examination of the 

 prosternum, which is really retracted in all specimens seen, though in 

 varying degree. The form of the prothorax seems less stable here than 

 in either of the other groups, and the thoracic spot is less constant 

 than elsewhere, its presence or absence being fortuitous in six of the 

 ten species in which it occurs. 

 The nineteen species now recognized separate as follows : 



