108 Proceedings of the Biological Society of Washington. 



Described from four specimens taken at Mokelumne Hill, Placer Co., 

 Cal. ; Aug. 19, 1916, by Mr. Walter M. Gifford, Commissioner of Agri- 

 culture, Honolulu, Hawaii. The male type is in the Wolcott collection, 

 the female type in the collection of the author, the paratypes (2) returned 

 to Mr. Blaisdell. 



Close to H. cribripennis Fall from which it is easily separable by the 

 form and sculpture of the thorax. In H. cribripennis Fall the thoracic 

 ratio is 38:47 as compared with 37:42 for binotata and the apical impres- 

 sion is straight not V shaped. 



