22 Mr. R. S. Bagnall on new Thysanoptera. 



IV. — Brief Descriptions of new Thysanoptera. — II. By 

 HiCHARD S. Bagxall, F.L.S., F.E.S. (Hope Depait- 

 ineiit of Zoology, University Museum, Oxt'oid). 



Suborder T E ii E B li A x T I A. 



Family Thripidae. 

 Scirtothrips signipennis, sp. n. 



$ . — Length 1*2 mm. 



Light lemon-jellow, first antennal joint almost white, 5 

 distally very lightly tinged with grey, 6 with distal two- 

 thirds (or thereabouts) and 7 and 8 wholly grey-brown. 

 Fore-wings grey-brown, second and apical fifths white or 

 light grey ; hind-wings with middle brown, corresponding to 

 the long dark patch of upper wing. 



Head transverse, about 0*8 as long as broad. Eyes rather 

 large and coarsely facetted, pigment very deep purplish 

 bhick ; ocelli with crimson crescentic margins. Antennpe 

 twice as long as the head, slender ; relative lengths of joints 

 approximately :— 16 : 22 : 32 : 30 : 32 : 32 : 7 : 13—1 and 2 

 much broader than any of the following, and 6 not divided. 

 Double trichomes on 3 and -l long and very slender. Mouth- 

 cone short, brown at tip ; maxillary palpi 3-jointed, joints 2 

 and 3 practically subequal in length. 



Prothorax about as long as head and about 1*6 times as 

 broad as long, surface sparsely and irregularly set with very 

 minute setae; one postero-marginal spine near each hind- 

 angle, short, only 0*25 the length of prothorax. Legs 

 somewhat stout, hind-tibia with a series of moderately fine 

 spines on distal half within, and tarsus with a series of similar 

 spines near apex. Pterothorax nearly 1"45 times as broad as 

 tlie prothorax, and about as long as broad. AVings slender, 

 reaching only to the sixth abdominal segment ; cilia fuscous, 

 tliose o£ hind margins very long ; fore-wing with three 

 minute, widely spaced setai on distal half of up[)or vein, and 

 lower vein witii but four setae. Hind-wing with median vein 

 continued almost to apex, very promiiunit through dark area. 



Abdomen elongate-ovate, dorsal surface finely and wavily 

 striate, in parts reticulate; segments \) and 10 with mod- 

 erately long and rather fine bristles, 9 being furnished with a 

 shorter dorsal pair which are somewhat widely separated. 



