— 169 — 



represented in England and on ihe Continent, but it is not unlikely that 

 other examples will yet be added from the Pacific Coast region where 

 the fauna] peculiarities lesemble those of Europe much more closely 

 than' the Atlantic region. As a rule our species are a little larger than 

 the corresponding European forms, and the pronotal striation is less 

 distinct. 



I am placed under renewed obligations to Mr. P. R. Uhler for the 

 loan of very valuable material in this genus and in BytJwscopus without 

 which the present studies would have been much more imperfect. 



The following synoptic key to our described species I have prepared 

 simply as an aid to determination. It is purely artificial and does not 

 pretend to exhibit to any extent the natural relationship existing between 

 the species. The value of the black dot on the propleura as a specific 

 or even a sexual character is perhaps somewhat questionable, but as it is 

 practically uniform in all the species before me, and a convenient 

 character, 1 have ventured to make use of it, trusting to future observ- 

 ations to prove or disprove its utility. 



SYNOPTIC TABLE. 



1 (_i6) Face unspotted. 



2 (7) Elytra hyaline or more or less obscured, not transversely banded or maculated 



toward tiie apex. 



3 (6) Propleura without a black spot. 



4 (5) Entire insect green ; elytra hyahne, nerves green i. viridis ^ 



5 (4) Ferruginous ; elytra hyaline or nearly so, with a piceous band on the base of 



the clavus 2. basalis 



6 (9) Tropleura with a black spot. Color dull green or brown, elytra smoky, at 



least on the apex and inner margin . . I. viridis (^' 



7 (2) Elytra colored, more or less distinctly banded or spotted with hyaline, at least 



toward the apex. 



8 (15) Propleura with a black spot. 



9 (10) Ferruginous; clypeus short and broad, lorre inconspicuous; size large 



3. ferrugineoides 



10 (9) Brown or brownish, at least above, or pale yellow ; clypeus of medium length 



or long, lorEC conspicuous (except in trimaculata). 



11 (12) Rugae very prominent ; clypeus long and narrow, ventral plate of $ dist- 



inctly convex, elytra brown with a pale point on the disk. . . .4. insignis 



12 (11) Rugae not very prominent ; clypeus broad, impressed beyond the loiae ; 



ventral plate of 9 flat. 



13 (14) Beneath and legs dark brown or black ; elytra brown trimaculate with pale. . 



5. trimaculata 



14 (13) Beneath and legs pale ; elytra whitish hyaline bifasciate with brown 



6. bifasciata 



15 (8) Propleura without a black spot. Yellow, elytra bifasciate with brown 



7. flavescens 



16 (i) Face spotted. Insect pale green ; elytra hyaline, nerves fuscous or at least 



tinged with brownish 8. punctifrons 



