MONOGRAPH OF THE GEXUS SAPERDA 



69 



the intervals, also in color and vestiture, and while some speci- 

 mens come very close to each other, we have seen no intergrades 

 of color and vestiture. T u 1 a r i in character seems to us to be 

 intermediate between m o e s t a and c o n c o 1 o r . 



It may be well at this point to remember that our species have 

 originated in the East, where all are found except two, p o p u I - 

 n e a and h o r n i i . Of these, p o p u 1 n e a has not specialized 

 from the Old World form, as has h o r n i i , which is evidently 

 descended from and is still closely related to s i m i 1 i s. C a 1 - 

 c a r a t a is the only one of our species that extends to the west 

 coast, where it has been found by Professor Piper in Washington. 



Bearing this in mind and remembering that m o e s t a , as a 







'^$: 



Fig. 7 Elytral characters of females: atulari, punctures scattered ; 3moesta, punctures 

 contiguous ; cpopulnea, punctures confluent 



unicolorous form, as we know it in the East, has not crossed the 

 Sierras and has not yet been found on the coast, there can be no 

 question of its being distinct. 



T u 1 a r i , like m o e s t a , is evidently of American origin 

 and not an emigrant from the Old World. The punctures and 

 dense punctulations in the elytra show a wider divergence from 

 p o p u 1 n e a than m o e s t a and connect that species and 

 m o e s t a with c o n c o 1 o r . 



Description S. p o p u 1 n e a Linn. [pi. 7, fig. 4] . Black, shining, 

 coarsely and deeply punctured, the punctures often contiguous 

 and confluent on the elytra; a few punctulations which are 

 sometimes wanting occurring between the punctures; sparsely 

 covered with a light gray or fulvous pubescence; thorax with a 

 lateral band of dense fulvous or vellowish grav hairs ; elytra 



