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 Laster /sland. 
Note: TRYBOM’s suggestion that his //. cahirensis (Physopoden aus 
Agypten und dem Sudan. 1911, p. 12) and BAGNALL’s /. ws?fatus are varieties 
of the same species, seems rather improbable. //. cahzrenszs differs from 7. 
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. cahirensts 
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 //. wszfatus 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. 
