256 JoiRXAr. Xew York Entomological Society. fVoi. xxii. 



Since the term hypopteron is sometimes incorrectly applied to the 

 tegulae, it might possibly be preferable to designate the sclerite hyp 

 (fig. 3) as the preepisternum, as is done by Hopkins, '09; or to 

 designate it by Snodgrass's term prepectus, which is an extremely ex- 

 pressive and appropriate one — this, however, is purely a matter of 

 personal preference. 



The term teguLx should be applied only to those sclcrites homo- 

 logous with the little shell-like scales (figs. 2, 4, and 6, tg) situated 

 slightly above and in front of the base of the mesothoracic wings, 

 easiest seen in the Hymenoptera and Lepidoptera. 



In his work on the thoracic sclerites of the blowfly, Lowne, '90, 

 applies the term epaulet to "a large scale fringed with black bristles" 

 and states that it " does not correspond with the tegula of the 

 H3'menoptera " (Lowne, '90, page 200). In some of Lowne's figures 

 it is very difficult to determine exactly to what sclerite he intends 

 that his designation epaulet should refer ; but in his figure 5. of plate 

 X, the ■' epaulet " is clearly the teglua (tg fig. 4, of the present paper) 

 and despite Lowne's statement to the contrary, it is homologous with 

 the tegula of the Hymenoptera (fig. 6, tg). 



Since Loew, '62, and other Dipterologists after him, have very in- 

 considerately applied the term teguLx to the so-called calyptra of 

 Rondani, '56 (or the two lobe-like expansions of the hinder margin 

 of the wing" menil)rane. near its base — fig. 4. dc and pc) . it might 

 perhaps be preferable to employ the term epaulet to designate the true 

 tegul.T, tg (fig. 4) in the Diptera. and thus avoid ambiguity. This 

 usage is sanctioned by Audouin. '40, himself, who, together with 

 Chabrier, '20, and many of the earlier French writers, use the designa- 

 tion " epaulette " as a synonym of the terms applied to the tegul?e of 

 various insects. 



The term squamulc-e was applied to the tegulae, tg (figs. 2 and 6) 

 by MacLeay, '30, (who attributed this usage to Latreille) and this 

 usage has been adopted by a few subsequent writers. This misap- 

 plication of the term, however, is very unfortunate, since the designa- 

 tion squamula has been used by many Dipterologists, to denote one 

 or both of the calyptra (fig. 4, dc and pc) mentioned above. 



Linne, 1758, who introduced the term squamula, applied it to the 

 calyptra, altrough it is impossible to tell from his description, whether 

 he intended to apply the term to one, or to both of the calyptra. 



