THYSANOPTERA FKOM THE WEST INDIES. 503 



Genus Sedulothkips, nov. 



Cheeks without ' tubercles. Antennse set low on the ventral surface of 

 head, between the eyes; joint 3 longer than 4; sense- cones moderately 

 long, shorter than in Eupat/iithrips. Anterior margin of prothorax strongly 

 omarginate. Fore-femur without tooth near apex within. 



Otherwise as in Eupatlntlinps. 



Sedulothkips insolens, sp. n. (PI. 48. figs. 13-15 ; PL 49. fig. 10.) 



? . This species so closely approaches S. vigilans, Hood *, that a detailed 

 description is unnecessary. The fore-tibise are unicolorous with the femora ; 

 the antennse are of a darker shade, yellowish-brown, and the stems of joints 4 

 to 6 are not so markedly yellowish as in vigilans, these joints being practically 

 unicolorous ; and the 6th joint is more fusiform and longer than the apical 

 and penultimate joints together. The prothorax is broader, at least 2*5 times 

 as broad as its median length ; all bristles present, blunt, and longer than in 

 vigilans, those at posterior angles at least 0*5 the median length of the pro- 

 thorax, and those at anterior angles and the mid-lateral pairs not shortened 

 as in vigilans. 



The fore-wings are of a uniform brown with slight yellowish tinge and, 

 if anything, richer in colour basally ; median thickening (which almost 

 attains apex in hind-wing) darker brown. Fore-wings darker in colour 

 than in vigilans, not strikingly lighter distally, and without the clear patch 

 near base ; surface distally curiously sculptured, giving the appearance of 

 being set with scales ; 27 cilia duplicated. 



Abdominal segment 8 longer than the tube (in ? vigilans not so long). 

 Distal half of tube not noticeably lighter ; hairs on segment 9 2*6 (in ? 

 vigilans 2*0) times the length of tube, and outer terminal hairs just twice the 

 length, the innermost pair shorter. 



Through Mr. Hood's kindness, I have had the satisfaction of examining the 

 c? and ? types of his Polyommatotlirips vigilans. I was at first tempted to 

 regard my solitary example as referable to vigilans, but it differs in so many 

 little points (of which the chsetotaxy of the prothorax and the 9th abdominal 

 segment and tube, the coloration, and curious sculpturing of the fore-wings 

 seem to be the most important) that it seems necessary to regard it as 

 belonging to a second species. 



I hope that further examples will be met with, so as to make a closer 

 examination of these points possible, and more especially of the curious 

 surface-structure of the fore-wings. 



Type. In the Hope Collections, University Museum, Oxford. ' 



Habitat. Trinidad. One ? with JiJupathitJtrips silvestrii, Buffa, from on 

 and in cracks of a dead cacao-tree. 



*' Psyclie,' XX., August 1913; p. 123. 



