14 THE EMBRYOLOGY OF THE HONEY BEE 



mann (1884, 1886, 1887, 1892) for the eggs of Phyllodromia 

 (Blatta), Periplaneta, Blabcra, Lasius, Pieris, Musca, and 

 Vespa. In the first four genera named these bodies were rod- 

 shaped, and strikingly resembled certain bacilli. Moreover, this 

 resemblance was enhanced by the fact that these bodies multi- 

 plied by transverse fission. They were found to be especially 

 abundant in the cortical layer, and also present in the fat body 

 of the imago. In the three genera last named, these bodies were 

 rounded or granular in shape and only tentatively identified with 

 the bacillar form. Wheeler (1889) has also found and described 

 these bodies in Blatta, and gave them the name "Blochmann's 

 corpuscles." Mercier (1906) has demonstrated that these are 

 independent organisms, probably bacteria, and capable of culti- 

 vation in artificial media. Friederichs (1906) has recently de- 

 scribed similar bodies, which he terms "Blochmann's corpuscles" 

 ("Blochmannische Korperschen"), embedded in the protoplasmic 

 meshwork and cortical layer of certain chrysomelid beetles 

 (Chrysomela, Rhagonycha), and Tanquary (1913) finds similar 

 bodies in the eggs of an ant, Camponotus. In the case of the 

 honey bee the minute bodies to which has been given the term 

 "Blochmann's corpuscles" are of course comparable only to the 

 rounded form, and only provisionally identified with these, since 

 in the honey bee so little is known concerning these bodies that 

 final identification would be premature. 



Turning to the accounts of the hymenopterous egg in particu- 

 lar, there are available the accounts of Henking (1892) for 

 Lasius, Carriere and Burger (1897) for the mason bee (Chali- 

 codoma) and Anthophora, Marshall and Dernhehl (1905) for 

 Polistes and Tanquary (1913) for Camponotus; for the honey 

 bee Biitschli (1870), and Grassi (1884). Henking's observa- 

 tions contain little of interest here, except that the egg of Lasius 

 possesses a well developed cortical layer. In the case of Cliali- 

 codoma the account is brief, essentially contained in the state- 

 ment that the contents of the egg "very fluid, consists of an 

 emulsion of a considerable amount of deutoplasm (food yolk) 

 in a small amount of protoplasm." The cortical protoplasmic 

 layer is wanting, but present in Anthophora. The data given by 

 Marshall and Dernhehl regarding Polistes are brief and relate 

 principally to the cortical layer. This is very similar to that of 



