﻿1 10 POMONA JOURNAL OF ENTOMOLOGY 



outer margin and segments six to eight with two ; ninth with one long spine on 

 each side on dorsal surface near outer margin, and anal segment with four 

 spines on dorsal surface near anterior margin, and two small spines at tip. 

 Segments one and two and posterior half of three white, the rest very dark 

 brown, darker than thorax and head. 



Measurements: Head, length 0.15 mm., width 0.24 mm.; prothorax, 

 length 0.22 mm., width 0.27 mm. ; mesothorax, width midlaterally 0.29 mm. ; 

 metathorax, width posteriorly 0.21 mm.; abdomen, width at base 0.10, at sixth 

 segment 0.46 mm.; total length 1.59 mm. 



Described from one female, taken by Prof. C. F. Baker in Managua, 

 Nicaragua. 



Food plant unknown. 



This specimen was taken several years ago and, unfortunately, mounted 

 on a pinned slip ; consequently, the antennae and all but one hing leg had been 

 broken off before being mounted in balsam by the writer. Although some 

 of the most important characters were thus destroyed, nevertheless it is plain 

 that it belongs to the fam. Aeolothripidae, and to the genus Aeolothrips, in 

 which I have placed it. It resembles closely Ae. bicolor Hinds, and Ae. al- 

 bocincta Uzel, in having the basal portion of the abdomen white, abdomen 

 more or less narrow at attachment to thorax, and, also, in the general aspect 

 of the head and prothora.x, though the shape of these differ in the different 

 species. In Ac. bicolor and albocincta. however, the white band is on the 

 second and third abdominal segments, while in Ae. vcspiforniis the first, 

 second, and posterior half of third are white. The absence of cross veins 

 presents not only a specific difference, but also a slight departure from the 

 generic description as given by Hinds. It is hoped that other specimens of 

 this same species, or some closely related to it, will at some future time be 

 taken, and thus the true relationships of this imperfect specimen be made 

 plain. 



Heterothrips decacornis n. sp. 



Average length 1.18 mm.; color dark brown, occasionally light brown; 

 body surface reticulated. 



Head (Fig. 50 A), one and one-half times as wide as long, slightly re- 

 tracted into prothorax, broadest across cheeks, narrowed anteriorly, with con- 

 cave depressions at insertion of antennae ; cheeks arched, with two setigerous 

 tubercles behind eyes on margin ; no prominent spines on head ; back of head 

 reticulated. Eyes large, bulging; facets large, sometimes conspicuously pro- 

 truding ; pigment orange-yellow ; eyes pilose. Ocelli remote from front, some- 

 what elevated, the anterior ocellus on anterior incline of elevated area, and di- 

 rected forward ; posterior ocelli contiguous with inner margin of eyes. Mouth 

 cone medium, subacute ; maxillary palpi three-segmented; labial palpi one-seg- 

 mented. Antennae (Fig. 50 D) ten-segmented, without style at tip; III and 

 IV lemon yellow, the rest dark brown ; IV with pseudo-joint near base and 

 a round sense area in the space cut off by the pseudo-joint ; IV and V largest. 



