Mr. R. Shelford on the Studies of the Blattidae. 659 



Total length {$) 15 mm.; length of body {$) 12 mm., (?) 

 13'2 mm. ; length of tegmina (<£) 13 mm., (?) 4 mm. ; pronotum 

 4 mm. x 4 - 8 mm. 



Hah. Congo State, S.E. Katanga, 4,000' (S. A. Neave) 

 (British Mus., Oxford Mus.); N.E. Rhodesia, Serenje 

 district, 4,500' (S. A. Neave) (British Mus., types; Oxford 

 Mus.). 



This is quite distinct from the preceding species. 



Hemithyrsocera vinula, Stal. 



Blatta vinula, Stal, Oefv. Vet.-Akad. Forh., xiii, p. 166 

 (1865). 



Blatta amoena, Walker, Cat. Blatt. Brit. Mus., p. 229 

 (1868) (part). 



$ . Head and antennae piceous ; distance apart of eyes equal to 

 length of 1st antennal joint ; antennae slightly incrassated. Pro- 

 notum piceous, margined all round with flavo-hyaline. Tegmina 

 and wings exceeding the apex of the abdomen. Tegmina castaneous, 

 the marginal area hyaline, the disc with a darker streak or the base 

 darker than the apex, radial vein bifurcate in posterior third, the 

 lower branch frequently multiramose, 12-15 costals, anterior ulnar 

 vein bifurcate, 7 longitudinal discoidal sectors. Wings suffused 

 with castaneous, mediastinal vein 5-ramose, 7-8 costals which with 

 the mediastinal rami are incrassated, radial vein bifurcate, anterior 

 ulnar vein simple, medio-discal area more than twice as broad as 

 medio-ulnar and crossed by 7 or 8 transverse venules, triangular 

 apical area moderate, divided only by the vena dividens, 1st axillary 

 4-ramose. Abdomen piceous, margined laterally with testaceous ; 

 supra-anal lamina trigonal ; scent-gland opening on 7th tergite ; 

 sub-genital lamina rather asymmetrically produced, bordered with 

 lappets as in the two preceding species, the left lappet produced. 

 Cerci moderate, piceous. Legs piceous, apices and lateral margins 

 of coxae testaceous, all the spines rufous. Front femora armed 

 according to Type B. 



? . Similar to ^ , but sub-genital lamina semi-orbicular, ample, 

 supra-anal lamina triangular. 



Total length (^) 11 mm., (?) 12 mm.; length of body {£) 

 9 mm., (?) 10 mm.; length of tegmina {$) 8-9 mm., (?) 10-2 

 mm. ; pronotum 2 - 8 mm. x 3"4 mm. 



Hob. Natal (Stockholm Mus., type; British Mus.); 

 Portuguese E. Africa, Beira (S. African Mus.) ; N.E. 



TRANS. ENT. SOC. LOND. 1912. — PART IV. (FEB.) Y Y 



