1951] 
Straneo — American Pterostichini 
17 
Key to the Species of Cynthidia 
1 (8) Third interstice of elytra with 2 or 3 impressed 
punctures. 
2 (5) Frontal furrows deep and irregularly wide, 
the space between them carinate at middle. 
3 (4) Prothorax with two basal impressions of sub- 
equal depth on each side; aedeagus as figured 
(Fig. 13) crocipes Perty 
4 (3) Prothorax with only the inner basal foveae 
(spaces between latter and lateral margins 
flat or very slightly impressed) ; aedeagus as 
figured (Fig. 14) majorina n. sp. 
5 (2) Frontal furrows only moderately deep, not ir- 
regularly wide, the space between them reg- 
ularly convex but not carinate at middle. 
6 (7) Interstices of elytra flat; dorsal pores on third 
interstice more distinct; elytra more or less 
opaque; prothorax shorter; frontal sulci wider 
planodisca Perty 
7 (6) Interstices of elytra subconvex; dorsal pores on 
third interstice less distinct ; elytra not opaque ; 
prothorax longer; frontal sulci narrower 
cancellata Brulle 
8 (1) Third interstice of elytra with wide foveae. 
9 (10) Elytra damasked octocoela Chaud. 
10 (9) Elytra not damasked foveata Chaud. 
Cynthidia majorina, n. sp. 
Very near C. crocipes. The new species differs from the 
latter as follows : head with a light, minute, oval fovea near 
middle of front, between frontal sulci; prothorax less nar- 
rowed anteriorly, without distinct external basal impres- 
sions; elytra with dorsal punctures more conspicuous. 
Length 11 mm. Aedeagus with different apex (Fig. 13). 
Holotype $ (Museum of Comparative Zoology, Type No. 
28,424) and allotype $ (coll. Straneo) from Mafra, Sta. 
