288 C. B. Osten Sacken: Notice on the terms tegula etc. 



p. 219) and Walker, probably follow Stenhammar, in calling it 

 axillary lobe. 



If, some time or other, a reform of the nomenclature of the 

 terms discussed by nie should be attempted, I would recommend 

 squamae, in the plural, as a designation for both of these organs 

 taken together; squama, in the Singular, would mean the posterior 

 squama alone;^) and antisquama the anterior squama alone; the 

 Strip of membrane running in some cases between them, or connecting 

 the squama with the scutellum. should be called the connecting 

 membrane. Alula would be the nanie for the lobus and lobulus 

 of Stenhammar and Haliday; it is preferable, because the latter are 

 general terms which may be used in other connections.-) 



However, until these changes are generally adopted, I shall use 

 tegula and antitegula, as I have done before. 



Hitherto, the group of characters in question has been very 

 little used for descriptive purposes. Tegulae have been noticed princi- 

 pally in the Muscidae Calyptratae, where they can be easily 

 peroeived even in dried speeimens; but, in many famiiies they offer 

 a variety of structures, as soon as we study them in fresh speei- 

 mens, or take the trouble to soften dried ones by moisture. 



The present paper is the result of a compilation which I made 

 in 1891, before introducing the term antitegula; I publish it in the 

 hopc of saving some labour to those who may be interested in the 

 same subject. 



1) Weinland always mentions the squama (Schüppchen) in the 

 Singular, meaning the posterior squama (Weinl. 1. c, p. 16—17. 



-) I am aware that Comstock (Manual, etc., p. 421, 1895) is just 

 of the opposite opinion: „The terms alula and alulet are also often 

 misapplied, being used to designate the posterior lobe of the wing, ' 

 but it seems to me that in this case he is mistaken. 



