1913.] NATURAL SCIENCES OF PHILADELPHIA. 277 



Blattella germanica (Linnaeus). 



1767. [Blatta] germanica Linn£Eus, Syst. Nat., 12th ed., p. 688. [Denmark.] 

 Misiones. February 4, 1910. (No. 3.) One female. 



Subfamily NYCTIBORINJE. 

 *Nyctibora limbata (Thunberg). 



"1826. Blatta limbata Thunberg, Mem. I'Acad. Imp. Sci. St. Petersb., X, 

 p. 277." 



Misiones. January, 1911. (No. 9.) One male. 



We have followed Shelford in using limbata for the species usually 

 called sericea Burmeister. The set of the Memoires in the Academy 

 library unfortunately lacks volume ten, so we are unable to verify 

 this reference. The present specimen has but four tarsal joints in 

 the right caudal tarsus and another male from Puerto Bertoni, 

 Paraguay, has the same true of the left caudal tarsus. 



This species has been recorded by the author from Puerto Bertoni, 

 Paraguay, but it is here reported from Argentina for the first time. 



Subfamily EPILAMPRIN.E. 

 Rhicnoda jorgenseni n. sp. 



Type: 9 ; Misiones, Argentina. December 2, 1910. (P. Jor- 

 gensen.) [Acad. Nat. Sci. Phila., type No. 5,210.] 



Closely resembling R. rugosa Brunner, from the Oriental region, 

 but differing in the proportionately broader abdomen, the broader 

 and less produced supra-anal plate, which is also much more shallowly 

 divided, and in the smaller size. 



Size medium; form greatly depressed; surface of the dorsum 

 coriaceous. Head with only the extreme cephalic portion of the 

 vertex visible beyond the pronotum; facial portion strongly depressed 

 and flattened; interocular space equal to twice the depth of the eye, 

 rugulose, the occipital outline moderately arcuate, very narrowly 

 rounded in section; antennae subequal to half the length of the body. 

 Pronotum semicircular in form, the cephalic and lateral margins 

 regularly arcuate, caudal margin subtruncate with the faintest 

 possible very low broad median projection, lateral angles very 

 narrowly rounded. Caudal margins of the meso- and metanotum 

 arcuato-emarginate, that of the metanotum more decidedly so than 

 that of the mesonotum, the median projection of the metanotum 

 more decided than that of the pronotum or the mesonotum, Teg- 

 mina equal to about two-thirds of the length of the pronotum, 

 lateral, squamiform, the basal width of the same but little less than 



