50 



INSECUTOR INSCITl/E MENSTRUUS 



The two known species may readily be separated by means of the 

 following 



KEY TO THE SPECIES OF HOLOPOTHRIPS 



A. Head 1 .2 times as long as wide ; eyes much longer than their distance from poste- 

 rior margin of head ; antennae twice as long as width of head. Prothorax with 

 anterior angular bristle about as long as postoculars. Antennal segments 3-6, 

 fore tibiae, all tarsi, abdominal segments I -3 (rarely only 1 and 2), and usually 

 the hind coxae and femora, nearly clear white . Holopothripa signatus Hood 



AA. Head 1 .6 times as long as wide ; eyes much shorter than their distance from pos- 

 terior margin of head; antenna; 2.7 times as long as width of head. Protho- 

 rax with anterior angular bristle minute and barely visible. Color of entire 

 insect nearly uniform dark blackish brown . Holopothrips tenuis Hood 



Fig. 1. — Holopothrips signatus, new genus and species, head and prothorax of female, 

 greatly enlarged ; holotype. 



Fig. 2. — Holopothrips tenuis, new species, head and prothorax of female, greatly en- 

 larged ; holotype. 



Holopothrips signatus, new species (fig. 1 ). 



Female : Length about 1 . 7 mm. Color blackish brown, with coral 

 red hypodermal pigmentation in head, thorax, and abdominal segments 

 4—9 ; antennal segments 3-6, fore tibiae, all tarsi, abdominal segments 

 1 -3 (rarely only 1 and 2) and usually the hind coxae and femora, nearly 

 white. 



