292 ENTOMOLOGICAL NEWS [Dec., '22 



which was found by Mr. E. R. Leach of Piedmont, California, 

 floating in an irrigation ditch in Nevada County, California. 

 Type in my collection, paratypes in the collection of Mr. Henry 

 Dietrich. 



This small species varies in amount of vestiture, one speci- 

 men being almost without hairs, the type being a fair average. 

 It also varies in the distance apart of the cephalic ends of 

 the carinae enclosing the margined area of the prosternum ; 

 I have seen no case where they actually meet, but in two 

 instances they very nearly do. 



Table to the Species of Heiacrlus.\ 

 Prosternum subcylindrical. 



Posterior femora over three times as long as wide. 



Pygidium and propygidium with the punctures separated by a 



space equal to the diameter of a puncture....!, morsus Lee. 



Pygidium and propygidium with the punctures contiguous and 



coarser than the above 2. strenuus Fall 



Posterior femora about two and one-half times as long as wide. 

 Pygidium without hairs, propygidium with hairs. 

 Centre of thoracic discal area punctate and hairy, 



3. tristriatus Horn. 

 Centre of thoracic discal area finely punctate and without 



hairs . _. 4. hirsutus Mart. 



Pygidium and propygidium both with hairs. 



Outer surface of legs moderately clothed with long, pointed, 



plumose hairs 5. williamsi Mart. 



Outer surface of legs moderately punctate, femora without 



hairs, tibia with small pointed hairs 6. zelus Fall 



Outer surface of legs moderately, closely punctate with minute 



blunt hairs 7. blanchardi Lee. 



Pygidium and propygidium both hairless 8. horni Wickh. 



Prosternum depressed. 



Prosternal margined area closed in front by a coalescence of the 

 margining carinae. 



Carinae of the margined area converging to a rounded point, 

 slightly sinuate before meeting. 



Upper surface of body sparsely punctate with suberect, 



squamose hairs 9. minimus Fall 



Upper surface of body closely punctate with long, pilose 

 hairs 10. pilosus Mart. 



fl am unable to find any record of the capture of Hetaerius hclcna,- 

 Mann in the United States and see no reason for its inclusion in Leng's 

 List. 



