230 



I have been unable to examine all of the type specimens. The 

 description of new species oi Iscluioptera from female examples is 

 strongly to be deprecated. 



KEY TO AFRICAN SPECIES OF ISCHNOPTERA. 



1. Species of large size (exceeding 18 mill, in 



totallength), legs bicolorous I. cyuralis sp. n. (Camsroons). 



1'. Speci.s of smaller size (not exceeding 18 mill, 

 in total length), legs unicolorous. 

 2. Pronotum black with 3 discoidal rufous 



spots /. Bocagd BoL. (Angola). 



2'. Pronotum not as above. 



3. Unicolorous piceous species I. picea Schvlth. (Somali- 



3'. Not unicolorous piceous species. [land). 



4 . Scent-gland opening at base of supra- 

 anal lamina. 

 5. A pair of backvvardly-directed chitin- 

 ous processes from beneath the 6th 



abdominal tergite /. cinnamotnea Gerst. 



[= basalis Gerst.] (Game- 

 s'. No backwardly - directed chitinous [roons). 

 proctsses. 

 6. Subgenital lamina symmetrical . /. Rohdei &p. n. (Caim roons). 

 6'. Sub-genital lamina asymmetrical. I. bintaculata Gerst. 



(German E. Afiica). 

 4'. Scent-glands not opening at base of 

 supra-anal lamina. 

 5. Sub-genital lamina very asymme- 

 trical. 

 6. With only one genital style. 

 7. Style slender (fulvo-testac< ous 



species) /. malagassa Sauss. & Zehnt. 



(Madagascar). 

 7'. Style robust (castaneous species) /. nataknsis Walk. (Natal). 



C With two styles /. strigosa Schaum. 



[? = incur iosa Sauss.] 

 (E. Africa). 

 5'. Sub-genital lamina less asymmetri- 

 cal, with two styles. 

 6. Supra-anal lamina produced, con- 

 siderably exceeding sub-genital 

 lamina. 

 7. Supra-anal lamina sub-quadran- 

 gular (fulvo-testaceous specie!', 



pronotum immaculate) . . . I. relucens Gerst. (Came- 

 7'. Supra-anal lamina triangular [roons). 



(sordid testaceous species, pro- 

 notum indistinctly bi-macu- 

 late) /. sordida sp. n. (Cameroons). 



