242 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.40. 



margins of the segments more or less testaceous, and covered with 

 grayish-white hair bands, those on the first two segments wanting 

 in the middle, but on the third and fourth entire. 



Habitat. — Nikko, Japan (Koebele) . 



A species of the group of H. tumulorum, noticeable for the large 

 head, with a well-developed occipital region. Among the described 

 Japanese species it is nearest to //. alexoides Strand, but this latter is 

 larger, with the tarsi and basitarsi of the female clear yellow. 



Type.— Cat. No. 13529, U.S.N. M. 



In the following key the new species is contrasted with several 

 other related forms: 

 Abdomen densely covered with pubescence, the apical hair bands, if any, not con- 



spicuous 



1. 



Abdomen with very conspicuous apical hair bands 2. 



1. About 9 mm. long; hair of abdomen distinctly ochreous, wings slightly milky. 



(Buda; Friese) cariniventris Morawitz. 



Smaller; hair of abdomen dense, pale grayish; vertex and mesothorax bluish. 



vestitus Lepeletier. 



2. Metathorax dark, greenish-black (Innsbruck; Friese) tumulorum Linnaeus. 



Metathorax clear green 3. 



3. Mesothorax small, closely punctured but shining, the surface visible between the 



punctures nikkoensis Cockerell. 



Mesothorax very densely punctured, granular subauratus Rossi (including 



seladonius Fabricius) and virescens Lepeletier (including gramineus Smith.) 



HALICTUS CALCEATUS Scopoli. 



Gersau, Switzerland, July 30, and Rigi Culm, Switzerland, August 

 1, 1909 (T. D. A. and W. P. Cockerell). 



HALICTUS QUADRINOTATUS Kirby. 



A male at Wangen, Baden, August 5, 1909 (Cockerell). 



HALICTUS PAUXILLUS Schenk. 



Two females at Wangen, Baden, August 5, 1909 (Cockerell). Frey- 

 Gessner remarks that one would take this for a small //. albipes, but 

 it has the mesothorax less densely punctured, with the surface between 

 the punctures plainly visible. This is well said, for among a series 

 of II. albipes received from Doctor Friese I find a pauxillus, collected 

 by him at Buda. 



HALICTUS INTERRUPTUS Panzer. 



One female at Wangen, Baden, August 5, 1909 (Cockerell). 



HALICTUS TUMULORUM Linnaeus. 



My wife and I collected this in 1909 at Troyes, France, August 8; 

 Gersau, Switzerland, July 30; Wangen, Baden, August 5. 



HALICTUS MORIO Fabricius. 



Wangen, Baden, August 5, 1909 (Cockerell). 



