Mr. R. Shelford's Studies of the Blattidac. 257 



5. Posterior angles of 7tli abdo- 

 minal tergite backwardly 

 produced ; abdomen above 



scabrous Cosmozosteria, Stal. 



5'. Posterior angles of 7tli abdo- 

 minal tergite not backwardly 

 produced ; abdomen above 

 smooth, nitid. 

 6. Lateral margins of pronotum 



not incrassated Anamesia, TeTpp. 



6'. Lateral margins of pronotum 



incrassated Desmozosteria, Shelf. 



3'. Tegmina quadrate, as long as the 

 pronotum. 



4. Wings absent Temnelytra, Tepp. 



4'. Wings rudimentary Scabina, nov, 



2'. Tegmina and wings well developed. 

 3. Pronotum anteriorly parabolic, sides 



deflexed Methana, Stal. 



3'. Pronotum discoidal, sides not 



deflexed Paramethana, Shelf. 



Genus 1. Polyzosteria, Burm. 



Polyzosteria, Burmeister, Handb. Ent. ii, p. 482(1838); 

 Brunner von Wattenwyl, Nouv. Syst. Blatt., p. 203 (1865). 



Chalcolampra, Saussure, Mem. Soc. Sc. Phys. Nat., 

 Geneve, xvii, p. 132 (1863) (preoccupied in Coleoptera). 



Characters. Ocelli absent. Antennae shorter than the body. 

 Pronotum anteriorly somewhat cucuUate, margins not reflected, 

 posteriorly truncate. Tegmina and wings entirely absent. Posterior 

 angles of the 7th abdominal tergite strongly produced backwards, 

 angles of the preceding tergites not, or scarcely, produced, angles of 

 the 9th tergite sometimes lobiform (cf. fig. 1). Stigmatic dots on 

 abdominal tergites well-marked. Supra-anal lamina, ( (J ) quadrate, 

 angles acute, ( 2 ) sub-bilobate, cucullate. Sub-genital lamina (^) 

 sub-quadrate, styles short, obtuse. Cerci short, flattened, blunt at 

 apex. Tibiae robust, almost quadrangular in section, spines on 

 outer aspect in 2 rows. Posterior metatarsus very short, unarmed 

 beneath, its pulvillus occupying the greater part of the joint. 



KEY TO THE SPECIES. 



1. Dorsal surface margined or spotted with 

 ochreous yellow. 

 TRANS. ENT. SOC. LOND. 1909. — PART II. (MAY) S 



