530 SOME NEW AND LITTLE-KNOWN EXOTIC THYSANOPTERA 



Genus ZYGOTHRIPS Uzel, 1895 

 Zygothrips Jordan i sp. n. (PL xiv., figs. 9-10). 



?. Length i"9-2'i mm.; breadth of mesothorax o'32-o'34mm. 



Colour uniform dark brown; antennal joints three to six 

 clear yellow, two apical joints greyish-brown ; tibiae light 

 brown, shaded to yellow at tip ; fore-tarsi yellow. 



Head about one and one-third as long as broad behind 

 eyes, and one and one-third as long as prothorax ; vertex 

 slightly raised. Eyes large, moderately finely facetted, 

 occupying about two-fifths the length of head, pigment deep 

 black ; post-ocular spines close to the posterior margins of 

 eyes. Ocelli large, anterior ocellus overhanging, posterior 

 pair placed above a line drawn through centre of eyes. 

 Mouth-cone broadly pointed, reaching half-way across the 

 prosternum. Antennae inserted below vertex, about one and 

 three-quarters the length of head; joints three to five clavi- 

 form, sixth truncate distally, and seventh and eighth monili- 

 form; a pair of long acute sense-cones on each of the 

 segments three to six. 



Prothorax one and one-third times as broad as long, all 

 spines present, moderately short, those as posterior margins 

 being the longest. Pterothorax about one and one-quarter 

 times as long as broad, wings present, apparently narrowed in 

 middle, and reaching to base of the fifth abdominal segment. 

 Legs moderately stout, fore-femur incrassate, tibia short and 

 stout, and tarsus furnished with a small tooth. 



Abdomen as broad as pterothorax, gradually and roundly 

 narrowed to tube. Two pairs of wing-retaining spines on 

 each of the segments one to seven ; pair near anterior margins 

 of segments one to six very strongly developed, and each pro- 

 tected by a strong, inwardly-directed sub-lateral spine on the 

 outer side and close to its base. Tube short and stout, one- 

 half the length of head, five-eighths as broad at base as long, 

 and about twice as wide at base as at tip. A pair of short 

 strong spines at apex of ninth segment. 



