NATURAL SCIENCES OF PHILADELPHIA. 53 



b. Punctate striate, interstices nearly smooth. 



1. Interstices very finely punctulate, callus visible. cocJileartoe. 



2. Callus well marked, interstices subrugulose. ovipennis. 



3. Callus none, interstices subrugulose, form convex. viridis. 



1. P. californica, Rogers. 



2. P arizonae, sp. n. 



Testaceous red, metastei-num and elytra blue ; antennse black ; 

 joints 1-4 testaceous; head foveolate; thorax very sparingly punc- 

 tate; elytra coarsely subseriate punctate; scutellum black, smooth. 

 L. .20. Arizona. Extremely near F. californica. 



3. P. lapponica (Linn.). 



I cannot separate the avowed specimens of C. lapponica from 

 Kenai from the C. iriierrnpta, Fab., which occurs nearly all over 

 the States. Dr. Horn has a series from California distinguished 

 by the fine punctuation, subseriate towards the suture; but they 

 do not differ specifically. 



4. p. tremulse (Fabr.). 



Distinct by its coloration. It is very common in Europe, and 

 has been sent from Hudson's Bay. 



5. P. scripta (Fabr.) Rogers, 1. c. 



The C. conjiuens, Rogers, is only a variety of this species, which 

 appears to be very near P. 20-maculata of Europe. In the North 

 varieties occur with entirely green elytra, but I have seen inter- 

 mediate specimens. 



6. p. obsoleta (Say). Rogers, I. c. 

 Apparently distinct from the preceding. 



7. p. prasinella (Lee). 



Oregon (Leconte), the serial punctures are almost lost in this 

 species. 



8. p. coclileariae (Syll.). 



I refer to this European species two specimens in Dr. Leconte's 

 collection without exact locality. 



9. p. oviformis (Lee). 



Oregon (Leconte). Near P. viridis, but more oval, depressed 

 and with a distinct callus. 



10. p. viridis (Mels.). Rogers, \. e. 



Very variable in color and sculpture. P. seruginosum, SufTr. 



