NO. 6 OPINIONS 105 TO 114 7 



According to our findings it is not necessary to set aside any of the Rules 

 or Opinions of the International Commission or to suspend the Law of Priority. 

 Summarizing hrieny the findings, we have the following: 



Oestrus Linn.. 1758, type oris by designation of Curtis, i8_'6. (W'cstwood, 

 1840 [Intr. Mod. Class. Ins.. vol. 2, p. 154] did not concur but desig- 

 nated Oestrus bovis Falu". as type. This selection is untenable, as Curtis' 

 has priority.) 

 Syn. Cephaleniyia Latr., 1818, type ovis (Monobasic-Isogcnotypic). (West- 

 wood, 1840, also uses ovis as type of Cephaleinyia.) 

 Gasterophilus Leach, 1818,^ proposed ft)r three species, eqiii Clark, hacinor- 

 rhoidalis Linn., and elarkii n. sp. liqni was designated as the type by 

 Curtis, 1826 (p. 146). (Westwood, 1840, used the same species as type.) 

 Hypoderma Latr., 1818, type bovis Linn, as restricted by Clark. 

 Cephenemyia Latr., 1818, type (Oestrus troinpe Fabr. =) O. luisalis Linn. 



(Alonobasic). 

 Oedcmagena Latr., 1818, type taraiidi L. (Monobasic). 

 . It is recommended that the foregoing- five generic names, with types as desig- 

 nated, be placed in the Official List of Generic Names. 



Opinion written by S. A. Rohwer. Concurred in by Drs. J. M. Aldrich, E. A. 

 Chapin, A. C. Baker and Carl Heinrich. 



Discussion v.y Secretary. — The Secretary has rc\'erified Linn. 

 (1758), and Latr. (1810 and j8i8) which are the nio.st important 

 papers involving the type designations of Oestrus prior to Curtis 

 (1826). He reaches the same conchision in regard to the invahcHty 

 of the designation by Latreille. 



On Ijasis of the study by Roliwer and his colleagues, the Secretary 

 recommends that the Commission adopt as its opinion the following : 



1. The type of Ocstnts Linn., 1758a, 584, is Ocsinis ovis, as defi- 

 nitely designated (Art. 30g) by Curtis, 1826. 



2. Latreille's (1810) designation of Ocstyits cqiii as type is not 

 valid, as this (cqui) contained two of the original species, hence was 

 not designation of one original species as type. 



Further the Secretary recommends the adoption of the proposal by 

 Rohwer and his colleagues that the following five names be placed 

 in the Official List of Generic Names : 



Ceplicneiiiyia Latr., 1818, Nouv. Diet. Mist, nat., vol. 23, 271, nU. troiiipe 

 Fabr., syn. of Oestrus nasalis Linn., 1758a. 



^The usual reference to this genus is 1817. Althougli the i^aper in winch tlie 

 generic name was proposed was read before the Wernirirui X'atural History 

 Society on April (1, 1811, it was published in volume 2 ni the .Memoirs of tliis 

 society, whieh is dated 1818, and we cannot find any indicaticui in tiie vi)lunie 

 itself to prove that it was published in 1817. It is certain tlial Leach's paper was 

 published prior to Latreille's because Latreille in his 1818 paper refers to 

 Gasterophilus Leach. 



