21)8 Mr. R. S. Bagnall on new Thysanoptera. 



darker near basal third and laterally. Antennas with joints 

 1 to 3 yellow ; 4 and 5 light brown, with basal thirds yellow ; 

 (> light brown, with basal fourth yellow ; 7 and 8 brown. 

 All femora light brown, shaded to yellow apically ; fore-tibiaj 

 yellow, and intermediate and hind-tibias yellowish distally 

 and basally. Hypodermal pigmentation thick. 



Head twice as long as prothorax and about 1'25 times as 

 long as wide ; cheeks bulging behind eyes, and from thence 

 converging to base. Eyes finely facetted ; ocelli moderately 

 large. Postocular bristles present, knobbed. Mouth-cone 

 extending across presternum. Antennas more than twice as 

 long as the head. Prothorax strongly transverse, 2*3 times 

 as wide through middle as long ; all bristles present, 

 knobbed. Nine cilia near apex of fore-wing duplicated. 

 Fore-legs stout and tarsi armed ; fore-tibia in the <$ with one 

 tooth near base, and femur with two teeth near apex within ; 

 in the $ simple. Abdomen roundly narrowed from seg- 

 ment 6 to base of tube. Tube about 0"5 times the length of 

 head. Apical bristles almost as long as tube. Abdominal 

 bristles well-developed ; segments 3 to 8 with one shorter 

 stout pair and one straight knobbed pair. 



Forma aptera. — Wings and wing-retaining spines absent. 



Bab. German East Africa : Arusha, f. rnacroptera, 1 <$ , 

 f. aptera, 1 <$ and 1 ? , Oct.-Nov., 1905 (C. Katoaa). 



Trfchothrips longiccrnis, sp. n. 



Forma aptera. — Length about 1*6 mm. 



Yellowish to chestnut-brown, head and abdomen generally 

 darker ; tube shaded to yellow at apex. Fore-tibia, at least 

 apically, yellowish ; basally and along the upper and lower 

 margins dark brown. Antennas with basal joint concolorous 

 with head ; 2 yellowish, tinged with brown basally ; 3 to 6 

 clear lemon-yellow, 6 sometimes faintly tinged and 7 and 8 

 very lightly tinged with brown. 



Head quadrate, only 0*08 longer than broad and about 

 1*5 times as long as the prothorax ; cheeks parallel to basal 

 fourth, then slightly narrowed posteriorly. Eyes well-deve- 

 loped ; front ocellus facing forwards; postocular bristles 

 long. Mouth-cone broadly rounded, not quite reacliing 

 across the presternum. Antennas about 2'2 times the length 

 of head, set below vertex ; relative lengths of antennal joints 

 3 to 8 as follows:— 20 : 19 : 20 : 21 : 23 : 18; two apical 

 joints slender. 



Prothorax transverse, 0'5 as long as broad ; pterothorax 

 nearly as broad as the width across fore-coxae, slightly 



