March, 1903.] Lenc : North Amkrican Cocci nellid.i:. 41 



much reduced. 'rhis form is confined to the Pacific coast and is 

 exfensa Muls. Between these two extremes occur very many inter- 

 mediate forms, some of which have been named by Major Casey, but 

 in view of the variability of the large series before me collected at vari- 

 ous points in the Rocky Mts. by Mr. E. J. Oslar, I am not sure that 

 these names represent even established geographic races. For cabinet 

 arrangement these forms may be arranged as follows if desired : 



Three elytral bands 5-signata 



Subapical band or spot lacking leporina Mii/s. (T'cm/'x Csy. ) 



Subapical band lacking, middle band represented by two spots unnamed. 



Subbasal band narrower, others represented by small dots (united in puMCticoIlis 



Qj'.) subsimilis c\r. 



Middle and apical band lacking extensa Afn/s. 



The last occurs as far as I know only west of the Sierra Nevada, is 

 certainly a good variety and should be added to our list as 



3041a. H. extensa .l////.f., 1851. Cabfornia. 



3042. H. ambigua At-c, 1852. California and Oregon. 



With this species, itself closely related to the preceding I include 

 as geographic races obliqtia and politissima of Casey. All the forms 

 have immaculate elytra rarely a few small spots but may be separated 

 as follows : 



Thorax without discal divergent lines ambigua. 



Thorax with discal divergent lines. 



Elytra feebly alutaceous obl iqua . 



Elytra highly polished politissima. 



The discal divergent lines of the thorax when present may be rep- 

 resented by two short dashes at middle of thorax, or they may be so 

 extended as to leave only a narrow black design on a white ground. 

 In the series collected for me by Miss Dennis at Dilley, Oregon, 

 every intergrade can be found. 



3043. H. Lecontei Muh., 1S51. Colorado to California. 



In this' species the trilobed scutellar spot is accompanied by hu- 

 meral spot, post-median spots or band and subapical spot and its pat- 

 tern of maculation closely resembles that o^ ^-signata. 



3043a. H. mcesta Lcc, 1854. British Columbia, Oregon. 



Very distinct from all others and I know of no reason for regard- 

 ing it as a variety of the preceding. 



3044. H. glacialis Fab., 1775. Northeastern America. 



No division of this species has been proposed. Major Casey is in 



