BEES IN BRITISH MUSEUM. 349 



It is possible that more than one genus may later be recognized 

 among the species I here call Paracolletes, but in order to do this it 

 will be necessary to formulate new generic characters, grouping the 

 species in quite a new manner. This may become necessary or use- 

 ful when more species are known ; the Museum now contains quite 

 a series of undescribed species, and no doubt very many more await 



discovery. 



II \ IK II S Latr. 



Hal ictus creberrimus Sm. 9 (T.). 



Hind spur pectinate with few teeth ; hind tarsi fulvous, contrast- 

 ing in color with the brown tibia and femur ; base of metathorax 

 finely longitudinally wrinkled ; mesothorax dull, with close minute 

 but quite distinct punctures; abdomen quite hairy; third s. m. 

 large, much larger than second. In Robertson's tables it seems to 

 run to cressoni, or rather to versatus or coreopsis; it really runs 

 nearest to coreopsis, but I should hardly call the mesothorax sparsely 

 punctured, it is quite closely so. The brown pubescent abdomen 

 would agree with versatus. Compared with H. ruidosensis it differs 

 by the much smaller punctures of mesothorax ; the narrower, broad- 

 oval head with narrower face ; the lively ferruginous tegulae ; the 

 lack of a shining ridge bounding mesothoracic enclosure; the sepia 

 stigma ; the brown, hairy abdomen, etc. 



Halictus incouspicuus Sm. 9 (T.). 



Very small, expanse of wings only about 7 mm. ; hind spur of 

 hind tibia pectinate with a few large teeth ; stigma pale dull brown ; 

 tegulre shining-reddish testaceous; area minutely roughened, with 

 only obscure basal wrinkles laterally; abdomen dark brown ; third 

 s. m. ordinary, its outer nervure faint. In Robertson's tables seems 

 to run nearest to versatus. 



Halictus coriaceus Sm. 



This is the species we have always so identified. 

 Halictus crassicornis Kirby 9. 



Nova Scotia (Redman) ; det. Smith. Is an Evylwus, and in 

 Robertson's table appears to run closest to foxii. Hind spur pecti- 

 nate with four or five teeth ; head and thorax black, abdomen very 

 dark reddish ; tegulse dark reddish ; stigma honey color ; metathorax 

 truncate, no defined area, but basal region rather coarsely wrinkled 

 all over; mesothorax dull, with minute punctures. 



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



