.S86 C. B, Osten Sacken: 



cah/pUWes, tant de fois rcnianiees et reniiscs snr le melier, etaient 

 pretes, et Uli oiit enfiii parn dignes de voir le.joiir. Les AcaliipU'rves 

 auraient suivi bientot, ainsi que Tattestent les materiaux amasses par 

 Tauteur et les nianuscrits qne noiis possedons." This collocation of 

 (kdiipterccs and Acahjptnu'es proves, tliat tho Editor laboured undor 

 the mistakeii notion tliat tliese divisions, iiitroduccd by Macqnart 

 (1848), were eqnivaleiit tn tlie distribution adopted by R.-D. in ISMO, 

 But this is by no mcans the case. The Cah/pten-es Macq. (1843), 

 as I have shown (p. oMO) are cquivalentto the CahipU'recs R.-D. (ISMO) 

 plus bis ^lesomydae (Antliomiiiae aiiciornnO. Tiic rest of the 

 Myodaires or Muscidae, which Macquart called Acah/pirrces, 

 had no general nanie in R.-D."s work of 1830. This niisappiehension 

 induced the P^ditor to introduce, on p. 81, aftcr line T): I. Les Ca- 

 hipteröea, the line IL Les Acalypterees, which certainly did not 

 exist in R.-D.'s manuscript. If R.-D. had adopted this iniportant 

 innovation, that is, Macquart's definition of the Cah/pU'n'es, he 

 vvould have nientioned it in bis letterpress somewhere. Nevertheless, 

 not a Word about it is to be fonnd. 



The faniily (gens) Calypicrves of R.-D., in bis work of ISMO, 

 ends on p. 4 CS of tlie volume with the genera Pyrellia and Phor- 

 niia. The ('alyptc'rc'es of the sanie R.-D. in bis posthumous work 

 (18(53), volume sccond, end with the same genera. In both cascs, 

 the Mesomydne R.-D. (Anthomyiae. mtctorum) are not inoluded. 

 Exeept in that Single line (p. 81, line C>\ the terni Acalyptt'rn's does 

 not occur in the two volumes of 1863. And in the alj)habctical In- 

 dex at the end of Vol. II, p. 8G9, under the vocable Acalypterees, 

 that Single line alone is referred to. 



This niisapprehension of tlie Editor was a puzzle to nie for 

 sonie time, before I succeeded in nnravelling it. 1 take eure there- 

 fore to call the attention of dipterologists to it. 



Note III. 



On Rondani's nse of terms sqnamac, calyptrn and sqnamae 

 calyptrorum (1843 — 1S77). 



I. Sqnamae (1843 — 1856), before the Prodrome, 

 Vol. I, (1856). 



Sqnamae albidissimae N. Ann. di Bologna 1843 (n. g. Al- 



hertia). 

 Sqnamae albae ibid. 1845 (Merodon). 



„ fusco-lntescentes ibid. 1845 (n. g. Phytomyptera). 



