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



There are several examples in Mr. Patterson's collection, and 

 a comparison with the original specimens makes it necessary 

 to amend and amplify the description. It is larger than 

 originally stated, being about 1*8 mm. long, and as regards 

 colour the apical and penultimate antennal joints are chestnut- 

 brown, of a lighter shade than the body. The prothorax has 

 the postero-marginal setae moderately long, those at posterior 

 angles being about 0*4 the length of the prothorax : the mid- 

 lateral pair is shorter, whilst the antero- marginal pairs are 

 quite short, thus differing markedly from the prothoracic 

 setas in T. femoralis, Moulton. There are two rather stoutish 

 genal spines at about the basal fourth of head. . 



$ . — Forma macroptera. — The wings are rather stout, 

 reaching to the abdominal segment 7 ; clear with smoky- 

 grey cilia and without (apparently) any duplicated cilia, thus 

 again demonstrating the species' close relationship to T. 

 femoralis. 



Hah. Gold Coast, Aburi, one macropterous and several 

 apterous females and a few young larvae, from a "conical 

 gall (not mad^ by thrips) on leaves of undetermined plant," 

 November 17, 1915. Reg. no. 263. 



Cryptothrijjs group. 



Cryptothrips shavianus, sp. n. 



J . — Length about 3*0 mm., belonging to the major, Bagn.- 

 carbonarius, Hood, group. 



Colour dark blackish brown, abdomen up to the fifth or 

 sixth segment lighter, but apically very deeply pigmented 

 black. Fore-tarsus and apex of fore-tibia yellowish-brown. 

 Antennal segment 2 apically yellowish, 3 yellow lightly 

 touched with brown distally, 4 grey-brown with basal third 

 or thereabouts yellowish, basal fourth of 5 similarly yellowish 

 and extreme base of 6 yellowish, which is scarcely noticeable 

 in one example. Wings of a light smoky greyish-yellow, 

 lighter (to almost clear) distally ; fore-wings with scale and 

 a small basal patch brown, and with two roughly defined 

 lines (the part between being light) running for two-thirds 

 the length of wing ; lower wing with a similar double line, 

 which is, however, situated closer to the upper margin of 

 wing. 



Head large, approximately rectangular, converging very 

 slightly posteriorly, 1*3 times as long as broad. Kyes small, 



