BEES IN BRITISH MUSEUM. 351 



be described as subclavate ; the tibiae, especially the hind ones, are 

 dark, with base and apex light red; third s. in. quite large, with its 

 outer nervure quite strong. Smith's expression "rufo-fuscous" does 

 not well describe the abdomen ; it is practically black, with the hind 

 margins of the segments reddish. Of Robertson's species it seems 

 nearest to eressoni. It is a considerably smaller insect than zephyrus, 

 and has a much darker abdomen. 



Halictus pilosus Sin. 9 (T.). 



Runs to pilosus in Robertson's tables; second s. m. very broad; 

 hind spur with about five long spines; third and fourth abd. seg- 

 ments entirely covered with ochraceous felt. 



Halictus lrevissimus Sin. 9 ( T -)- 



Hind spur with very few long teeth ; b. n. strongly bent ; third 

 s. m. quite large, broad above ; outer nervures weak as in Chlora- 

 lictus ; abd. segments with basal lateral hair-patches on 2 and 3, 

 and 4 and 5 pruinose-hairy all over, but not closely felted as in 

 pilosus; stigma rather large, pale dull honey color; abdomen with 

 a strong reddish tinge ; on disc of second segment, at least, one can 

 see numerous very minute and delicate punctures; head and thorax 

 dark blue-green, the mesothorax almost indigo; area rather well- 

 defined, semilunar, with longitudinal wrinkles; head fairly broad. 

 Seems not to be in Robertson's tables. 



Halictus rhododnctylus D. T. {fulvipes, Sm.) 9- 



Remarkable for the wholly fulvous hind tibiae and tarsi, contrast- 

 ing with the dark brown femora ; the other tarsi are fulvous, but 

 their tibiae are clouded with dark brown ; hind spur with few long 

 spines; metathorax truncate, its basal area minutely rugoso- 

 cancellate ; abdomen quite hairy; venation of Chloralictus ; second 

 s. m. quite large. 



Halictus capitosus Sm. (T.i. 



Cheeks produced to a large tooth beneath; wings strongly vol 

 lowish. A townsendi like form. 



Halictus discus Sm. 9 (T.). 



Quite large, about 10 mm. long, and robust. In Robertson's 

 tables it runs to Lasioglossum, and the metathorax has the trunca- 

 tion with the sharp edge of fuscipennis. From type fuscipennis, it 

 differs entirely by the abdomen very much broader at base ; wings 



TEANS. AM. ENT. SOC. XXXI. SEPTEMBER, 1905. 



