G e n u s XII. STELGIDOPTERYX.
Type.
Stelgidopteryx, Baird, B. N. Amer. p. 312 (1858)..................................... »S', serripennis.
lìamjv. N o r tli Am e ric a , u o t ex ten d in g in to th e hig h n o rth . The whole o f C e n tr a l Am e ric a , and So u th
Am e ric a to Bolivia and S o u th e rn Brazil.
Claris specierum.
a. J u g u lum c iu e ra s c en ti-b ru u n eum , forsan ru fo tin c tum : g a s tn e um im um p u rè
a l b u m 1. serripennis, p . 635.
b. J u g u lum rn fe sc en s ; abdomen su lp h u ra sc en s : subc auda le s albai vcl ¡lallide
flava , b ru n n e o s u b te rm in a litc r n o ta ta .
a', U ro p y g ium pallidè b r u n n c u m ......................................................................................... 2. ruficollis, \i. GÌ7.
b'. Uro p y g ium c i n e r a s c e n s ...................................................................................................... 3. uropygialis, p. 651.
ii'