NOVITATES ZOOLOGICAE XXI\^ 1917. 365 



I have a large number (some 50 or 60), unset as yet, received in 1916 from 

 Perregaux, Hammam R'ihra, Sidi-bel-Abbes, etc., besides the above 143. 

 The British Museum has I ? Algiers, Leech coll. 



87. Pachygastria trifolii maiiretanica (Stdgr.). 



Bombyx trifoHi var. niauretanica Staudinger, Iris. vol. iv. p. 262 (1891) (Lambessa). 



This appears to be the "Hants Plateaux" and "mountain" race of lii/olii, 

 as opposed to the " coastal " one. Though extremely variable, it is charac- 

 terised as a rule by its washed-out appearance, due to the large admixture of 

 j^ellow and grey scales, and in the many hundreds I have seen there has never 

 been a single rufous or chocolate-brown specimen, such as are frequent among 

 the coastal t. codes. 



902 Guelt-es-Stel. September— October 1912-1913, Faroult. 



125 Environs de Batna, September— October 1909-1915, Nelva. 



7 Bordj-bou-Arr6ridj, September 1912, Faroult. 



2 larvae, Boghari, W. R. and E. H. 



4 larvae, Guelt-es-Stel, W. R., K. J., and Faroult. 



1 larva, Batna, Nelva. 



I larva, Boudj-bou-Arreridj, Faroult. 



The Tring Museum series totals 1,034. 



[Lambessa staudingeri B. Baker and its allies. 



Dr. Griinberg and Mr. Oberthiir place these in the genus Lasiocampa, but 

 they certainly form a very distinct group of insects, and I feel certain the genus 

 Lambessa ought to be upheld as distinct. Mr. Oberthiir further on p. 333 of 

 Fasc. XII. of his Etudes Comparees accuses me of paying no attention to the 

 variabihty of Lambessa staudingeri because I described a Lambessa decolorata 

 sordidior and accentuates the fact that I gave no figure. Mr. Oberthiir then 

 proceeds to give a French translation of what I said. 



I can only once more repeat that Mr. Oberthiir as well as many other ento- 

 mologists have failed to realise that in Mauretania there are two ciuite distinct 

 species of Lambessa : one with an apterous 9 and the S with shorter antennae 

 = staudingeri B. Baker, and the second one in which tlie ? is fidl-winged and 

 the (J has very long antennae. 



It therefore remains for me to try to unravel the nomenclature of the 

 various forms of the genus Lambessa. Mr. Bethune Baker described staudingeri, 

 Entom. Month. Mag. vol. xxi. p. 242 (1885) (Lambessa), and in the Fasc. V. 

 (part i.), plate Ixv. Nos. 621-625 Mr. Oberthiir figured five staudingeri from the 

 neighbourhood of Sebdou. As I have never seen any Lamliessa or Ehenchela 

 examples so strongly washed with brown, I described or rather named this 

 Sebdou race from Mr. Oberthiir's figures .staudingeri castaneolavata (NoviT. ZoOL. 

 vol. xxi. p. 314 (synopsis of forms under No. 51) (1914) (Sebdou)). These are the 

 first descriptions of the only two wingless forms of Lambessa. We now come 

 to the winged forms : the earhest described is decolorata Klug. (Symb. Phys. 

 Ins. ii. folio vi. p. 3. No. 1. pi. xx. f. 1 (1832) (vicinity of Alexandria)). This is 

 a ? fully winged and of a uniform yellowish cinnamon-brown colour. The next 



