ADDENDA 285 



basal angles to the apex and are less arcuate, and that the punctures in 

 the concave deplanature are much smaller and sparser, tending to form 

 transverse incised lines; scutellum less transverse, semicircular; elytra 

 scarcely as wide as the prothorax, with parallel straight sides, circularly 

 rounded in about apical two-fifths, and not from about the middle as in 

 ferruginea, the general aspect as in that species, except that the punctures 

 between the costae are larger, feebler and more lineiform, the subsutural 

 costa very irregular and more feebly defined and the humeral angles 

 narrowly and not broadly rounded; sparse punctures of the abdomen 

 stronger. Length 9.5 mm.; width 5.4 mm. British Columbia (Alder- 

 mere), Keen. 



The characters as detailed above will distinguish this species 

 very clearly from ferruginea Linn., or any of its varieties. A 

 specimen of ferruginea from Boulder Co., Colorado, resembles the 

 eastern and European specimens in general form, but it is darker 

 in color and has the punctures at the sides of the pronotum and 

 elytra much finer and sparser than in the normal examples. 



We have two species of Calitys Thorns. (Nosodes Lee.), the 

 common ochraceous-brown eastern and European scabra Thunb., 

 and serrata Lee., a larger and broader black species occurring in the 

 Sierran regions of California and Oregon ; the latter is not a synonym 

 of scabra as is usually stated in the lists. 



II 



The incertus section of the depurator group of Hister, is distin- 

 guishable at once from the depurator section comprising also 

 circinans and perbrevis by the marginal stria of the mesosternum 

 intervening between the coarser submarginal stria and the apex. 

 This stria is always interrupted medially but is very evident; in 

 the depurator section it exists only as a vestige far down on the 

 sloping sides of the mesosternal apex. I find that there are several 

 distinct species belonging to the incertus section, heretofore mingled 

 together in most collections, and having the following general 

 features in common: 



Elytra with three entire striae, the humerals wanting or in part 

 feebly traceable; lateral thoracic stria not attaining the base, the 

 marginal near the edge and extending only to about the middle; 

 cephalic stria entire; mesosternum variably sinuate, the anterior 

 tibiae tridentate, the lower tooth bifid at tip. 



The species and subspecies are as follows: 



