176 
Psyche 
[September 
middle; short pale stripes at sides of front betewen antennae and 
eyes; large pale yellow bands on cheeks, broad above, attenuate 
below; cheeks almost wholly impunctate; scape light in front, 
flagellum obscurely reddish beneath; disc of mesothorax im- 
punctate; tubercles pale yellow; tegulae light ferruginous; wings 
dusky hyaline, nervures and stigma dark; abdomen beneath with 
thin pure white hair. 
Taboga Island, June 29. Related to such species as C. 
quinquemaculata Ckll. (Guatemala), but on account of the 
small size, color, and reduced markings, at first suggesting al- 
liance with the smaller members of the C. dupla group. 
Ceratina viridula Smith 
Taboga Island, June 29. 
Colletes rohweri Cockerell. 
Las Sabanas, July 7, female. C. rohweri was described from 
a male collected at Zaruma, Ecuador. The present female agrees 
well except in the usual sexual characters, and the lack of distinct 
bands on the abdomen, but these appear to have been denuded, 
the specimen being old, with ragged wings. The abdomen is of 
the fusiform type; the very broad hind tibiae are covered with 
black hair on outer side; the thorax above shows much black 
hair, but there is a dense band of white hair between mesothorax 
and scutellum; tegulae very dark brown; wings strongly stained 
with brown; flagellum obscure reddish beneath except at base; 
malar space very short; mandibles red apically. In Swenk’s 
table (1908) it stands near C. intermixtus Swenk, but is quite 
distinct. It is somewhat allied to C. motaguensis Ckll. (Guate- 
mala) . 
Halidus townsendi Cockerell 
Gamboa, July 9, two males; Ancon, Aug. 4, two females; 
Cristobal Aug. 10, two females; Red Tank June 30, July 1, two 
females. The females vary greatly in the size of the head. This 
is hardly more than a race of the North American H. armaticeps 
Cresson. 
