Mr. R. Shelford’s Studies of the Blattidex. 509 
WALKER’S NOMENCLATURE. 
Blatta colligata 
blatta polygrapha 
Blatta suffusa 
Blatta amplectens 
Blatta hamifera 
Blatta ignobilis 
Blatta funebris 
Blatta palpalis 
Blatta obtusifrons 
Blatta elegans 
Blatta apicigera 
Blatta propingua 
Blatta contiqua 
Blatta contingens 
Blatta sequens 
Blatta guttifera 
Blatta xanthopila 
Blatta laterifera 
Blatta virescens 
Blatta majuscula 
Blatta marmorata 
Blatta humeralis 
Blatta picticollis 
Blatta bipunctata 
Blatta laticeps 
Blatta cirewmducta 
Blatta longiuscula 
Blatta patula 
Blatta latirupta 
Ischnoptera reversa 
Ischnoptera conferta 
Ischnoptera ? obliqua 
Ischnoptera ? punctosa 
Periplaneta aterrima 
Periplaneta oculata 
REVISED NOMENCLATURE. 
Phyllodromia colligata, W1k. 
Phyllodromia polygrapha, W\k. 
Phyllodromia suffusa, W1k. 
Phyllodromia amplectens, W1k. 
Phyllodromia hamifera, W1k. 
Phyllodromia ignobilis, Wik. 
Phyllodromia funebris, W1k. 
Duryodana palpalis, Wik. 
Phyllodromia obtusifrons, Wk. 
Phyllodromia elegans, W1k. 
Theganopteryx apicigera, W1k. 
Phyllodromia propingua, Wik. 
Phyllodromia propinqua, W1k. 
Phyllodromiacontingens, Wk. 2 « 
Phyllodromia sequens, Wik. 
Phyllodromia quttifera, W1k. 
Pseudothyrsocera xanthophila, 
W1k. 
Phyllodromia laterifera, Wk. 
Phyllodromia virescens, W1k. 
Phyllodromia majuscula, W1k. 
Phyllodromia marmorata, W1k. 
Phyllodromia contingens, Wik. g. 
Phylodromia picticollis, Wik. 
Pseudectobia bipunctata, W1k. 
Pseudophyllodromialaticeps, Wk. 
Escala circumducta, W1k. 
Escala longiusceula, Wik. 
Allacta mundicola, Wik. ?. 
Allacta mundicola, Wik. ¢@. 
Ischnoptera reversa, W1k. 
Leucophea conferta, W1k. 
Pinaconota obliqua, W1k. 
Oniscosoma punctosa, W1k. 
Pelmatosilpha aterrima, W1k. 
Methana oculata, W1k. 
VI. VIVIPARITY AMONGST THE BLATTIDA. 
ATTENTION was first called to this phenomenon amongst 
the blattide by Riley (“Insect Life,” vol. iii, p. 443, 1890- 
1891 and vol. iv, p. 119, 1892), who observed it in 
Panchlora viridis, Burm. Scudder had already noted 
(Psyche, vol. v, p. 405, 1890) the occurrence of a female 
specimen of Panchlora nivea, L., found alive in a bath- 
room at Salem, Mass., surrounded by numerous newly- 
hatched young, but he had not been able to demonstrate 
the actual birth of these young. Riley dissected one of 
