ISCHNOPTEBA.— BLATTA. 41 



18. Ischnoptera blattoides, Sauss. 



Epilampra blattoides, Sauss. Melang. Orthopt. i. l er fasc. no. 16 (1863) . 

 Blatta capitata, Sauss. Mem. Mex., Blatt. p. 114. 53, t. 1. fig. 19 (<J) (1864). 

 Ischnoptera capitata, Brunn. de W. Syst. Blatt. p. 140. 21 ; Sauss. Miss. Scient. Mex., Orthopt. 

 p. 54. 1, t. 2. fig. 31 (<J) (1872). 



Hab. Mexico. — Beazil ; Cuba. — E. Indies &c. 



This species we suppose to be of Asiatic origin, having been imported into America, 

 where it is becoming widely spread. 



BLATTA, Linn. 

 Blatta, auctt. 



Phyllodromia, Serville, Orthopt. p. 105 ; Brunner de W. Syst. Blatt. p. 88. 



Liosilpha* (partim), Stal, Recherches sur le systeme des Blattaires (Bihang till k. Sv. Vet.-Akad. 

 Handl. ii. p. 10) (1874). 



Synopsis specierum. 



1. Alarum vena ulnaris indivisa vel furcata. — Blatta, L. 



Fulvo-testacea, pronoto nigro-bivittato. — 1. germanica, L. 

 11. Alarum vena ulnaris ramosa. — Phyllodromia, Serv. 



a. Femora anteriora subtus et ad apicem dense spinulosa. Lamina supra-analis $ apice 

 incisa. (Liosilphaf, St&l.) (Cf. Tab. IV. fig. 21.) 

 b. Elytra $ 6 membranacea, abdomen superantia. Species testaceae. 



c. Magna, testacea. Venulse costales alarum graciles. — 2. nahua, sp. n. 

 cc. Minores. Elytra $ abdomen vix superantia. 

 d. Alarum venulae costales clavatse. 



e. Major. Venulae costales alarum elongato-clavatae, fuscae. — 3. brunne- 



riana, Sss. 

 ee. Minor. Venulse costales breviter et crasse clavatse. — 4. delicatula, 

 Guer. 

 dd. Alarum venulae costales incrassatae, sed vix vel haud clavatae. — 5. azteca, 

 sp. n. ; 6. alaris, sp. n. 

 bb. Elytra $ abdomen haud superantia plus minus coriacea, S longiora. 

 c. Pronotum vittis 2 latis nigris. — 7. totonaca, Sss. 

 cc. Pronotum testaceum, haud vittatum : 



d. disco fusco. Elytra umbrata, in medio fascia vel notula pallida. — [8. supel- 

 lectilium, Serv.] / 



dd. Tota testacea. Lamina supra-analis 6 bilobata. — 9. fraterna, sp. n. 



* This genus cannot be maintained. It is based only on the fact that the supra-anal plate is emarginate at 

 the tip. This character is not generic ; it is to be found also in the second section (aa) of Blatta, so that one 

 would have to divide the genus Blatta into five genera if it was used. It is present also in Ischnoptera and 

 in several other genera of Blattinae. 



f Established on Blatta adspersicollis, Stal, from Brazil. 



biol. CENTE.-AMER., Orthopt., October 1893. Qg 



