Mr. R. Shelford on the Studies of the Blattidae. 651 



reaching the margin of the wing, medio-discal area a little more than 

 twice as broad as medio-ulnar area crossed by a few transverse 

 venules, triangular apical area very large, the vena dividens crossing 

 it in the lower half, 1st axillary 3-ramose. Abdomen above piceous 

 in basal half, the tergites margined laterally and posteriorly with 

 testaceous, rufous in apical half ; scent-gland opening on 7th tergite ; 

 supra-anal lamina trigonal. Abdomen beneath piceous, laterally 

 margined with testaceous ; sub-genital lamina asymmetrical bordered 

 on either side by lappets, tl- a iuflexed margins of the 9tli tergite, the 

 left lappet with apex slightly produced, the right style minute, the 

 left stout, hirsute, more or less concealed beneath the lamina, Cerci 

 fuscous, moderate, 9-jointed. Coxae castaneous at base, testaceous 

 at apex ; femora castaneous ; tibiae flavo-testaceous tipped with 

 castaneous. 



Total length 13 mm. ; length of body 10-5 mm. ; length of tegmina 

 11 mm. ; pronotum 4 mm, x 4"3 mm. 



Hah. Gambia (Oxford Mus., type), 



Thcgan&ptcryx rhodesiae, sp, n. 



^ . Testaceous, Head flavo-testaceous ; antennae fuscous, Pro- 

 notum with two broad castaneous vittae, lateral margins hyaline. 

 Tegmina with 20 costals, 6 longitudinal discoidal sectors, anterior 

 ulnar simple. Wings with marginal field infuscated, mediastinal 

 vein 3- 4-ramose, 13 incrassated costals, medio-discal area about twice 

 as broad as the medio-ulnar, crossed by 12 transverse venules, ulnar 

 vein bifurcate, upper half of triangular apical area crossed by two 

 veins, 1st axillary 3-ramose, Abdomen fuscous with pale lateral 

 margins. Supra-anal lamina rounded, surpassed by the subgenital 

 lamina which is produced and symmetrical ; styles absent. Cerci 

 piceous, situated close together at base. Legs testaceous. 



$ . Similar, but in some examples the tegmina and wings do not 

 extend beyond the apex of the abdomen. Supra-anal lamina trigonal, 

 sub-genital lamina semi-orbicular ample. 



Total length (^)9 mm., (?) 7-9 mm. ; length of body ((?) 8 

 mm., (?) 8 mm. ; length of tegmina ( (? ) 9 mm., (?) 7-9 mm. ; 

 pronotum 2-5 mm. x 3 mm, 



N,E. Rhodesia, shores of L, Bangweolo and Upper 

 Kalimgwisi valley (♦S'. A. Neave) (Oxford Mus,, types). 



Thegwnopteryx notata, sp. n. (Plate LXXIX, fig, 5.) 

 (J . Head testaceous, antennae fuscous, setaceous, distance apart of 

 eyes on vertex of head less than length of 1st antennal joint. Pro- 



