Calypteratae and Acalypteratae, Calypia and Calyptra. 335 



tatives of the second pair of wings of the Hymenoptcra etc. Tlie 

 name alnla has also been applied by Loevv and others to the 

 axillary ln1)o of the wing, sometimes callcd lobuliis (Afteiiappen 

 or P'lügellappen, Schi n er), which is a more correct application of 

 the terni/) 



These scale-like flat processes are usually named Schüppchen 

 by the German Dipterists, cnillerons by the French and sqnamae 

 by the Swedish. Robincau-Desvoidy divided the J/».'?<'/</(r<' into 

 two groat divisions by the dift'erence in size (the presence or com- 

 parative absence) of these organs, naniing them calypteratae and 

 acnh/pteratae from the Greek word Kalupteer, a cover. These 

 divisional terms have heen generally adopted; why then have the 

 nanies ceased to be applied to the organs themselves? Rob. -Desv, 

 nsed the term calypfa sometimes, but he abandoned it for the rather 

 Gurions one of cuilleron. or bowl of a spoon. Ilaliday nsed the 

 name calyptra in some of bis ]niblications, but the only anthor who 

 has adopted it altogether is Rondani. It seems to me to i)Ossess 

 a Claim over all the others, especially vvhen applied to the Muscidae. 



The two scales constituting these organs are in some respect 

 independent of each other, the larger one being attached to the scn- 

 tcUum, and lying behind, or rather beneath the other, with the smaller 

 one is connected with the wing, and moves with it independently of 

 the other. Osten Sacken wonld therefore give the two scales 

 different names, calling the lower and larger one the tegnla, as it 

 Covers the poiser, and the smaller one antitegnla. The term tegida 

 lias exactly the same nieaning as calyptrum, only one is derived from 

 Greek and the other is latin, and has no advantage over it. I think, 

 therefore, that we are bound to call these scales calyptra, as that 

 name has the claini of priority, and is especially applicable to the 

 calyptrated Muscidae. " 



Bradford, December 189G. 

 Note II. 



The Editor's, Mr. H. Monceaux's, Preface to R.-D.'s posthumous 

 Hist. Nat. des Diptercs des environs de Paris (Vol. I, p. IV, 

 1803) contains the following passage: „C'est ainsi qne les Myodaires 



The term alula, applied by Loew has the inconvenience of 

 having been used for squania by some English authors, and thus niay 

 easily be misunderstood. In otlier respects it is very appropriate, and 

 Rcaumur was right in describing it: „lä, il semble qu'iine petite aile 

 seit soudee n la grande." If alula is not adopted, axillary lobe, 

 which has been used by Haliday and Walker, would certainly be 

 the most proper term. (Compare my article, I. c. p. 287.) lipon con- 

 sideration, I now prefer the latter. — O. S. 



