THYSANOPTERA. FROM THE WEST INDIES. 505 



prothorax, all stout and broadened at apex. Fore-coxse projecting, with one 

 long, slender, and pointed bristle ; fore-femur 0-8 the length of the head and 

 about twice as long as broad ; tibia about as long as femur ; tarsus unarmed. 

 Prothorax a little longer than broad and only slightly broader than the 

 breadth across fore-coxse. Fore-wing very slightly constricted about middle, 

 with three stout setse, similar to those on the prothorax, at base ; cilia on 

 fore- and hind-margins somewhat long and widely spaced. 



Abdomen only slightly broader than pterothorax, about 3'5 times as long 

 as broad, practically parallel-sided, thence gently rounded to base of tube. 

 Tube about 0"6 the length of head, 0*4 as broad at base as at apex ; sides 

 evenly and gently narrowed. Terminal hairs greyish-brown basally, colour- 

 less distally ; longer than tube, but very slender and difficult to see. Bristles 

 on 9th segment slender and about as long as the tube. Lateral bristles long, 

 tapering, an inner pair stouter and knobbed. 



T^/pe. In the Hope Collections, University Museum, Oxford. 



Habitat. Trinidad, Oapara, August onwards, 1913. On leaves of Inga sp. 



Family Ohirothripoidiid^, mihi. 

 Genus Chirothripoides, nov. 



Size small. Form very slender and linear. 



Head longer than broad, produced beyond eyes ; ocelli on or above a line 

 across the fore-margin of eyes. Mouth-cone short, rounded. Maxillary 

 palpi 2-iointed, apical sensory filaments very long. Antennae with joints 

 3 to 5 at least as broad as long. 



Prothorax weakly chitinised, longer than head and longer than broad. 

 Fore-coxse very elongate, all legs short and stout ; fore-tarsus armed. 

 Pterothorax elongated ; wings long, very slender, and practically parallel- 

 sided from base to apex ; long cilia on both margins of fore- and hind-wings. 



Abdomen linear ; posterior margin of 8th sternite armed with a pair of 

 long lateral spines and a series of four shorter pairs between them, the 

 inmost being longest. 



Type. C typicus, mihi. 



The form of the antennae, head, prothorax, wings, and, in particular, the 

 curious armature of the 8th sternite make it difficult to place the species in 

 any of the recognized Tubuliferous groups, and for the present I regard it as 

 standing alone. 



Chirothripoides typicus, sp. n. (PI. 48. figs. 6-8 ; PL 49. figs. 3, 4.) 

 ? . Length 1*4 mm., breadth of mesothorax 0*175 mm. 

 Colour light yellowish- or greyish-brown. Ninth abdominal segment 

 LINN. JOURN.— ZOOLOGY, VOL. XXXII. 40 



