152 INSECUTOR INSCITI/E MENSTRUUS 



Prothorax a little more than one and one-half times as wide as long, 

 slightly shorter than head and with similar reticulation. Pterothorax 

 neeurly one and one-half times as wide as prothoraot, darkest in color at 

 sides ; mesonotal plate deeply incised in middle behind, the reticulations 

 converging to anterior end of this incision. Wings slender, saber-like in 

 form, about ten times as long as greatest subbasal width, almost attaining 

 tip of abdomen ; anterior vein of forewings usually with two short, incon- 

 spicuous bristles near apex and two near base of wing, the basal one at 

 the junction of the two principal veins ; posterior vein usueJly with two 

 similar bristles near apex and one near base ; wings of both pairs brown, 

 fore pair with a pale band in bascJ fifth and with all veins dark brown ; 

 hindwing with dark brown median vein. 



Abdomen distinctly wider than pterothorax, elongate-elliptical, deeply 

 reticulate above ; last segment abruptly narrower, tube-like, about as 

 long as head, divided in its entire length above by a longitudinal suture. 

 Abdominal bristles very weak and inconspicuous on segments I -8 ; seg- 

 ment 9 with four pairs of unusually stout and conspicuous dorso-lateral 

 bristles, of which one pair is nearly equal in length to last abdominal seg- 

 ment; apical fifth of last abdominal segment with two pairs of similar 

 bristles, about half as long as the segment. 



Measurements of holotype : Length 1.72 mm.; head, length 0.163 

 mm., width 0.192 mm.; prothorax, length 0.144 mm., width 0.234 

 mm. ; pterothorax, width 0.336 mm. ; abdomen, width 0.408 mm. ; 

 last abdominal segment, length 0. 1 74 mm. Antennal segments : \,27fi; 

 2, 48/'.; 3, 84/<; 4, 54pi; 5, 44//; 6, 45/<; 7, 15/i; 8, 56//; total 

 length of antenna, 0.37 mm.; width at segment 4, 0.022 mm. 



Described from 63 females, taken at Mayagiiez, Porto Rico, April 30 

 and May 3, 1 9 1 2, by Dr. C. W. Hooker, on Ipomcea sp. 



This species is one of the most distinct in the Neotropical fauna, and 

 is distinguished from all other known Thysanoptera by several remarkable 

 characters of generic importance. It is dedicated to the memory of the 

 late Dr. C. W. Hooker, who for several years was greatly interested in 

 this order of insects. 



Haplothrips gowdeyi (Franklin). 



Three specimens, all females, were taken by Dr. C. W. Hooker, 

 " from flowers, Mayagiiez, Porto Rico." The date and host plant are 

 not given. 



