4 PROCEEDINGS OF THE NATIONAL MUSEUM vol.08 



HALICTUS SOLOVIEFFI, new species 



Female. — Length about 7.5 mm., anterior wing 5.4 mm.; super- 

 ficially SO much like H. krcoloffl that I took it for the same, but it 

 differs as follows: Tegulae piceous; mesothorax dullish (without 

 polished surface), very closely and rather coarsely punctured; rugae 

 of metathoracic area fewer and not forming a network. In H. 

 kToloifi the disk of the mesothorax has the small punctures sepa- 

 rated bj'', on the average, considerably more than a puncture's width ; 

 in this form the punctures are large and dense, separated by hardly 

 half a puncture's width, and the intervals are sculptured. The hind 

 margins of the second and following abdominal segments are pallid, 

 those of the third and fourth quite broadlj-^ so ; and there are no con- 

 spicuous basal hair bands. The hind spur is long-pectinate. The 

 short fringe of the tubercles, and smaller size, readily separate it 

 from H. calceatus Scopoli. 



Kongaus, Siberia. August 9, female (Cockerell). 



Ty^e.— Cat. No. 27340, U.S.N.M. 



Named after Nicolas SoloviefF, of the Vladivostok Museum, who 

 has maintained a center for zoological work and education in spite 

 of difficulties of many kinds, and deserves the good wishes and 

 thanks of all scientific men. 



The following table separates a series of moderately large black 

 females of Halictus from the Maritime Province of Siberia : 



Mesothorax highly polished, sparsely punctured, and with a sharp edge in front 



(Kongaus and Okeanskaja) morbillosus orientis Cockerell. 



Mesothorax dull, or if shining, closely or rather closely punctured 1 



1. Large species, with hair-bands at apices of segments; third cubital cell more 



than twice as long as second, the second not particularly narrow ; wings 



strongly reddened (Okeanskaja) tetrazonius King. 



Third cubital cell not nearly twice as long as second, or if so, second very 

 narrow, and species relatively small 2 



2. Apical part of first abdominal segment polished, little or not punctured— 3 

 Apical part of first abdominal segment conspicuously punctured 6 



3. Tubercles with a very long fringe; wings dusky; head not circular (Okean- 



skaja) calceatus Scopoli. 



Tubercles with a relatively short fringe 4 



4. Larger; head circular moltrechti, new species. 



Smaller ; head narrower 5 



5. Tegulae dark ; mesothorax densely punctured soloviefl, new species. 



Tegulae red; mesothorax shining and more sparsely punctured. 



kraloffl, new species. 



6. Larger; second cubital cell broad (Kongaus) tacitus Cockerell. 



Smaller; second cubital cell narrow (Okeanskaja, Olga, Amagu village, 



Kudia River) alinensis Cockerell. 



The last is closely related to H. leucozonius Schrank. 



