THYSANOPTERA 693 



Prothorax three-quarters the length of the head, and one and three-quarters 

 as broad as long-. Prothoracic bristles apparently obsolete ; although all seta-pits are 

 present I can only discern bristles at the anterior angles, and these are extremely 

 minute. Pterothorax practically as broad as the width across the fore-coxae and 

 slightly broader than long. 



Legs moderately stout, fore-tarsus armed with a sharp tooth ; intermediate tibia 

 with a long, slender hair at the apical third (i.e. remote from the apex) without, and the 

 hind tibia with a shorter hair near the apex without. Wings present, reaching to the 

 eighth abdominal segment ; of a smoky colour and apparently coriaceous. 



Abdomen a little broader than the pterothorax, sides sub-parallel from the second 

 to the sixth segments, seventh segment gradually narrowed apically, and eighth 

 roundly narrowed to hind margin. Tube about four-fifths as long as the head, three 

 times as long as broad at base and furnished with what appears to be a well-marked 

 sense-area at apical fourth. Terminal bristles slender and about three-quarters the 

 length of the tube ; those at apex of the ninth segment also slender and about the same 

 length as the terminal bristles. Lateral and sub-lateral abdominal bristles long and 

 slender, those on segments six, seven and eight the longest. 



^ unknown. 



Hab. Hawaii; Kona, one female, 3000 feet, September 1892 (in spirit). 



(2) Trichothrips nigricans, sp. nov. 



Plate XVIII. f^g. 23. 



%. Length i'8 mm., width of mesothorax o'48 mm. 



Colour black ; all tarsi brownish. Antennae unfortunately broken in the type 

 specimen. 



Head and prothorax as in T. laticornis ; head with eyes slightly broader, the 

 space between them less, and the posterior ocelli touching their inner margins. Surface 

 reticulated finely. 



Mid-lateral prothoracic bristles very long, those at posterior angles and posterior- 

 marginal pair shorter ; others apparently obsolete. A small shallow fovea on each side 

 of mid-line. Legs rather short ; fore-pair incrassate and tarsus armed with a short 

 tooth. Wings reaching to the ninth abdominal segment, coriaceous, black, irregularly 

 tinged with yellowish-brown ; cilia black. 



Abdomen oblong-ovate, broader than in T. laticornis, and more roundly narrowed 

 to base of tube. Tube less than two-thirds the length of the head and only twice as 

 long as broad at base. Abdominal bristles long and slender. 



^ unknown. 



F. H. III. 89 



