8o ENTOMOLOGISK TIDSKRIFT 1 894. 



nients on a viviparous Cockroach and lent me the concerning 

 treatises, viz.. C. V. Riiev: A viviparous Cockroach (Insect Life, 

 Vol. Ill, p. 443 — 44) and the same author's: Further Note on 

 PancJilora (Insect Life, Vol. IV, p. 119 — 20). In the first paper 

 is stated that the author already had published a note on Pan- 

 cJilora viridis in »Proceed, Entom. Soc. Washington», Vol. 11, 

 p. 129. It is evident from these notes that PancJilora viridis 

 certainly at least as a rule gives birth to living young, but the 

 whole is confined to that the young are slipping out of »the eggs, 

 which as usually are to form an egg-chister» a short time before 

 the birth, that f. inst. a specimen »while being examined . . . had 

 given birth to about thirty living young, besides some individuals 

 still in their »pupa-cases» [egg sacs] and a cluster of about twelve 

 pupae [eggs] arranged side by side» (Vol IV, p. 119). Then this 

 fact is of little importance, only showing that while many other 

 Cockroaches are giving birth to an egg-cluster, the eggs of which 

 have the young undeveloped, the egg capsule remains a long time 

 within the female of PancJilora viridis, so that the young ones 

 become developed to such a degree that they hatch a very short 

 time before the birth. Among specimens of just this species, 

 captured by Dr. Meinert ('/l' 1892) in the island of St. Jan (West- 

 India) I have found a female with an egg-capsule somewhat pro- 

 truding from the vagina. Further Dr. Meinert has shown me a 

 specimen of the common South-American species: Blabera gi- 

 gantca L., captured in a drawer within a house in Caracas ('Vio 

 1891), in the drawer were also found several newborn young 

 running about, and on the well preserved adult specimen is seen 

 a pair of young protruding from the vagina. The newborn young 

 attain a length of 8,8 '"'", while the female is 43,5 "'"^ 



A comparison between these facts, observed in the fam. 

 Blattina, with that stated about Hemimcnis, shows sufficiently 

 that the development of these forms is essentially different, pre- 

 senting but a point of resemblance of secondary nature in the 

 birth of living young. 



IV. Occurrence and Biology. 



Saussure writes op. cit. p. 20: »Habitat: Littus orientale 

 Africse, Sierra Leone», and p. 12: »Nous ne savons rien du genre 



16 



