;!0 SJÖSTKUT.S KILIMANDJAKO-MEKU EXPEDITION. 17: 2. 



Usambara: Mombo (June). One female. Previously recorded froni Mozanibiciue 

 and Nyassaland, 



Farn. Blattidfe. 



The old-world genera of Blattidse with the posterior metatarsus longer than 

 the remaining joints and the tibial spines in three rows may provisionally be distin- 

 guished as foUows : 



1. Tegmina of J reduced, sonietiines very short, wings präsent or absent; of 

 $ reduced, sometimes quadrate, never squamiform. 



Blatta L. 



Type Orientalis L. 



2. Tegmina and wings of J longer than body, no scent-glands opening on P' 

 abdominal tergite, mesonotum and metanotum with short backwardly directed pro- 

 cesses. Tegmina of ? quadrate, wings absent, penultimate tergite not concealed by 

 antepenultimate tergite. 



Cartoblatta gen. n. 



Type pidchra sp. n. 



3. Tegmina and wings of c? longer tlian body, scent-gland opening on 1^* ab- 

 dominal tergite, mesonotum and metanotum with long backwardly-directed processes. 

 Tegmina of ? squamiform, wings absent, penultimate tergite almost concealed by 

 antepenultimate tergite which is depressed and declivous. 



Pseiulotleropcltis Krauss. 

 Type antennata Sauss. 



4. Tegmina squamiform in both sexes, in $ penultimate tergite not concealed 

 by antepenultimate tergite, which is not declivous. 



Stylopyga Fisch. 

 Type rhombijolia Stoll. 



5. Tegmina and wings longer than the body in both sexes; pronotnm trape- 



zoidal, anterior bordei' arcuate, sides deflexed. 



Periplaiieta Burm. 

 Type americana L. 



6. Closely allied to Periplaneta but the pronotum elliptical, the anterior border 



truncate, sides not deflexed. 



Hoinalosilplia Stäl. 

 Type Hstulata Burm. 



It is not easy to separate females of Sfylopyga from females of PseudoderopeUi.s, 

 the declivous 6*i> abdominal tergite almost entirely hiding the 7*'' tergite is perhaps 

 the most distinctive feature of the latter genus, giving the insects a peculiar truncate 



