1912] Johnson — The Genus Hcemafopota 181 



At Claremont, Cala., where I hurriedty examined some 20 nests 

 of this ant, I found the craters to vary from 4-8 inches in diameter, 

 with a central opening |^-| of an inch across. They were 

 in dry, hard soil, often along roads or paths in situations where 

 there was considerable vegetation, either chaparral, live-oaks 

 {Quercus agrifoUa) or scrub-oaks {Q. dumosa). In such localities 

 the ants probably obtain their supply of nectar from the galls 

 or from coccids and aphids on the oaks or other components of the 

 chaparral. Mr. Leonard has given a more extensive account of 

 the habits of mojave at Point Loma. He found that it is nocturnal 

 like horti-deorum and that it visits aphids on carnations and roses, 

 and the nectaries of the pepper tree (Schinus molle), rattle-snake 

 weed (Euphorbia setiloha), honey plant (Echium simplex) and 

 Ceanothus cuneatus. The last is a well-known element of the 

 Californian chaparral. 



THE NORTH AMERICAN SPECIES OF THE 

 GENUS HiEMATOPOTA. 



By Charles W. Johnson. 



In the Eastern United States the species of this genus are com- 

 paratively scarce, and in all my collecting I have taken only two 

 specimens. Under such circumstances it is often very difficult 

 positively to determme an inadequately described species of the 

 older authors: thus the only species collected in this region was 

 naturally referred to H. punctulata Macq., described from Caro- 

 lina. In preparing recently a faunal paper on the diptera of 

 Florida, my attention was called to four specimens collected by 

 Mrs. Annie T. Slosson, which were very different from Pennsyl- 

 vania and New Jersey specimens which I had referred to Mac- 

 quart's species. A careful study shows that the Florida specimens 

 are undoubtedly the true H. punctulata, while the more Northern 

 specimens represent a new species. The species may be tabulated 

 as follows : 



1. Antennae entirely black 2. 



Antennae with the third joint (except the annuli) red. Front with two sub- 

 quadrate black spots. Apical band of the wing broad and distinct from the 

 anterior to the posterior margin rara sp. nov. 



