132 CASEY 



terior angles broadly rounded ; surface sparsely but rather coarsely, 

 unevenly punctate medially, becoming unusually coarsely so and 

 less sparsely toward the sides, the bead thick; scutellum moder- 

 ate, transversely triangular ; elytra one-half longer than wide to 

 rather more, rapidly narrowed and with strongly rounding sides in 

 apical two-fifths, the apex broadly ogival ; surface with more or 

 less feeble evidence of a few longitudinal costte, rugose behind, 

 nearly smooth anteriorly, coarsely and more or less closely but 

 unevenly punctate; prosternum strongly, closely punctate, the 

 process rather narrow, moderately constricted, longitudinally con- 

 vex, rounded at tip, not margined except at the sides toward base ; 

 hind femora and abdomen with sparse but unusually strong, even 

 punctures throughout. Length 10. 2-12. 2 mm. ; width 4.75-5.9 

 mm. Farallon Islands farallonica Csy. 



Some of the species allied to nemoralis might almost as natu- 

 rally fall near subptcbescens in the preceding group, but the 

 form is a little more convex and the sculpture stronger, giving 

 them on the whole more nearly the general habitus of the 

 present group. There are evidences of some natural geographic 

 subdivisions of this group, oregona 3.r\d/'araIloiiica, for example, 

 being widely different from each other and from the usual type 

 and the series of northern species from callida to conferta also 

 hold together very consistently, departing widely in general 

 sculpture from the others. It is quite obvious that the species 

 formerly described by me under the name incBqualis, a remark- 

 ably isolated form by reason of the sharply acute elytral apex 

 and in having the prothorax wider than the elytra, with nar- 

 rowly subexplanate sides, is, by reason of the virtual absence 

 of elytral setse and because of the very feeble punctuation of 

 the anterior parts, the species held by LeConte and Horn to 

 represent the true eschscholtzi ; affinis is therefore a valid spe- 

 cies, being one of a considerable number of more or less closely 

 allied forms as noted above. 



Group VIII. — Type ovah's. 



The rather numerous species falling under this head replace 

 the allies of eschscholtzi in the northern Pacific coast and Rocky 

 mountain regions, and are distributed thence southwardly to the 

 eastern foothills in central Colorado, and, to the westward, through 

 Utah to western Nevada, this extended range being nearly 

 coincident with that of the sctosa group. The body is always 



