314 NOVITATEB ZOOLOGICAE XXI. 1011. 



49. Lasiocampa josua deleta sub.sp. uov. 



<??. Differs from ^'osMayosMa by the absence of the yellow patch at the base 

 of forewing in the (?, and in the greyish buff, not yellow snffasion of scales on the 

 wings. 



2 9? and several <S<S, Victor Faroult, September and October 1912 

 and 1913. 



50. Lasiocampa trifolii mauretanica (Stdgr.). 



Bombi/x trifolii var. maureUmica Staudioger, Iris vol. W. pp. 2G0-262 (1891) (CoQstantine). 



This is e.Ktremely variable. Faronlt sent in many hundreds of specimens from 

 September and October 1912 and 1913. 



The larvae of Josua mostly have grey hairs as opposed to the yellow ones of 

 the trifolii forms, but not always ; in fact the larvae of the trifolii gronp, W\e, josiia 

 group, and the damdis-grandis group of Lasiocampa are all very variable, and 

 sometimes indistinguishable. 



51. Lambessa decolorata sordidioi* snbsij. no v. 



A considerable amount of confusion has arisen with regard to the forms which 

 1 consider worthy of generic rank as Lambessa, but which Dr. Griinberg pnts 

 under Lasiocampa. This confusion has arisen because Dr. Seitz and others have 

 asserted that Lainbessa staudingeri occurs at Biskra. Lambessa staudingeri with 

 its apterons ? occurs only in the " Hants Plateaux " regions, while various forms 

 of decolorata King, occur in the " Hants Plateau.^ " as well as at Biskra. 1 

 described the form from Biskra as Lambessa virago. In my opinion there are only 

 ttiree species of palaearctic Lambessa, viz. staudingeri Baker and decolorata Klug., 

 with various subspecies or local races which I give in the following table; and 

 grisea Griinberg. d. sordidior differs from d. virago in the S being brown-grey 

 washed and suffused with dark cinnamon, and in the ? being cinnamon brown, not 

 fawn buff. 



The following are the several races of the three species of Lambessa : — 



Lambessa grisea. Palaestine. 



L. staudingeri staudingeri. Algeria, Hants Plateaux, Province Constantine. 



L. staudingeri castaneolavata nom. nov. Hants Plateaux, Prov. Oran (Sebdou). 



[Differs in being washed in varying degrees with cinnamon rufous.] 

 /,. decolorata decolorata. Egyptian Soudan. 



Uniform brown-grey. 

 />. decolorata virago. Palaestine ? Biskra, El Kantara. 



Uniform dark greyish buff. 

 L. decolorata sordidior. Prov. Alger Central, Hants Plateaux. 



Uniform cinnamon grey-brown in S ; cinnamon brown in ?. 

 L. decolorata datini. Tunisia. 



Uniform slate grey. 



All the larvae of the various forms and species of Lambessa are almost 

 identical. 



Victor Faroult sent 64 c? J and lii ? ? from the months of August, September, 

 and October 1913 ; and I had several ? ? from Dr. Nissen taken in October 1912. 



