INSECUTOR INSCITI^ MENSTRUUS 33 



Described from 3 females and 3 males taken on Tessaria 

 sp. at Lima, Peru, December 18, 1912, by Mr. E. W. Rust. 



Liothrips tessaricB appears to approach most closely the L. 

 seticollis Karny, from Paraguay, but may be separated by the 

 absence of a brown, median, longitudinal streak on the wings 

 as well as by the antennal coloration and the absence of a 

 tarsal tooth. 



Ommatothrips, new genus. 



(Bufia, eye; dp((p, a wood worm) 



Head long, its length fully 1.5 times its greatest width, 

 which is usually across eyes, with a pair of long bristles on 

 vertex at inner angle of eyes. Eyes large, finely faceted, 

 broadly rounded in front, on ventral surface of head nar- 

 rowly prolonged posteriorly much beyond posterior dorsal 

 margin. Vertex subconically produced, overhanging the 

 frontal costa and bearing the anterior ocellus at its extremity. 

 Antennse eight-segmented, inserted very close together on 

 ventral surface of head; intermediate segments (4-6) obliquely 

 truncate on inner surface at base and outer surface at apex; 

 segment 3 elongate. Prothorax about half as long as head. 

 Legs slender; fore femora not enlarged; fore tarsi unarmed 

 in both sexes. Wings strong, of equal width throughout. 

 Tube only slightly longer than the preceding segment, about 

 half as long as head. 



Type. — Ommatothrips gossypii Hood. 



To Ommatothrips, in addition to the type species, must be 

 assigned Liothrips elongatus Bagnall and L. intermedins Bag- 

 nail. This Neotropical genus may at once be known from 

 the allied Liothrips Uzel by the short tube, the prolongation 

 of the eyes on the ventral surface of the head, the presence 

 of distinct anteocular bristles, and the form of the intermediate 

 antennal segments, which are obliquely truncate at both base 

 and apex. 



Ommatothrips gossypii, new species. 



Female (macropterous). — Length about 3.2 mm. Color 

 dark blackish brown, or black, with the second segment of 



