276 OLOF AHLBERG 



Haplothrips usitatus Bagn. var. inermis n. var. 



This variety agrees in every respect with the description and figures of 

 H. usitatus Bagn. (Fauna Hawaii, 3, 1910), except that the anterior tarsi are 

 unarmed and the antennal segments more thickly pedunculate. 



4 females from Easter Island. 



Note: Trybom's suggestion that his H. cahirensis (Physopoden aus 

 Agypten und dem Sudan. 191 1, p. 12) and Bagnall's H. usitatus 2iVe varieties 

 of the same species, seems rather improbable. H. cahirensis dififers from H. 

 usitatus not only by the unarmed anterior tarsi and the somewhat longer 4th 

 antennal segment, mentioned by Trybom, but also in other respects. I will 

 particularly call attention to the fact that the sides of the head of H. cahirensis 

 are rather uniformly arched, the head being a little wider behind the middle 

 and slightly narrower at the posterior margin than immediately behind the 

 eyes, while the head of H. usitatiis is widest immediately behind the eyes and 

 then becomes distinctly narrower backwards, the sides being slightly arched. 

 A comparison between type-specimens of the two species will perhaps reveal 

 more differences. 



