KOVITATEB ZoOLOOiOiE XXIV. 1917. 347 



I, of course, cannot tell what material Dr. Griinberg had before him at the time 

 he wrote, but I have at present in the Tring series 48 specimens said to be 

 wfm-upto from the following localities: lU district ; Repetek, Turcomania ; 

 Maralbashi ; Aksu ; Yuldus ; Urumtschi ; Sarepta ; Askabad (Aschabad) ; 

 Naryn, Gultsha, Osch, Irsyn, Sajan ; Laycd ; Pompejefka, Little Chingan 

 Mountains ; Chabarovsk, Ussuri Railway ; Beirut, Syria ; also Batna, Khen- 

 chela, and Bou Saada in Algeria. These fall at first sight into six distinct 

 groups: true interrupki from Sarepta, Askabad, and Naryn; petri from Aksu, 

 Yuldus, Maralbashi, and Repetek ; a new form from Irsyn, Layed, Pompejefka, 

 and Chabarovsk ; syra Gr.-Grsh. from Beirut ; a new form from Ih ; and last, 

 but not least, the Algerian fonn, of which there are eighteen examples. C. syra 

 Gr.-Grsh. is described Annuaire Mus. Petersb. vol. iv. p. 471. No. 18 (1899) 

 (Syria), and two other species or forms have been described of this group, viz. 

 htdoviciae Piingl., Iris, vol. xiv. p. 180. No. 58. pi. ii. f. 15 (1901) (Chinese 

 Turkestan) ; and intercalaris Gr.-Grsh,. Ammaire 31 us. Petersb. vol. iv. p. 470. 

 No. 17 (1899) (Thien-Tsing, China). C. syra is characterised by its pale pink 

 forewings and strongly reduced dark markings of the forewings, while Ivdoviciae 

 has yellowish white forewings, and the dark marks have no trace of orange 

 margins, which are distinctly present in syra. C. intercalaris resembles petri, but 

 has not got the very strongly pectinated antennae of that form and has strongly 

 marked orange edges to the band. 



All these forms, syra, petri, htdoviciae, the two new forms, and intercalaris, 

 do not affect the question of the Mauretanian form, except the latter in respect 

 to the yellow and orange edges of the band. 



The Mauretanian Cerura as represented by my 18 specimens vary very 

 much : there are some with broken bands, some with even unbroken bands, 

 and others with bands more or less constricted in the middle ; further, there 

 are specimens with and without the orange-yellow margins to the bands both 

 as regards specimens with broken or unbroken bands, and there are some with 

 only a vestige of yellow ; however, in my series there are none with as much 

 yellow or orange as in certain European individuals of bifida. I have therefore 

 come to the conclusion, first of all, that there are no interrupta Christ, in Maure- 

 tania at all ; and secondly, that there is only one species of Cerura so far known 

 from there. It remains to be seen what that species is. 



So far, I think, there can only come into question two species, bifida Huebn. 

 and intermlaris Gr.-Grsh. The description given by the author, Mr. Griim- 

 Grshimailo, of the latter is as follows : " Antennae nigrae ; thorax inter scapulos 

 griseo-pilosus ; caput, prothorax, et alae anticae supra dilute ochraceo-grisei ; 

 abdomen et alae posticae pallidiores, subalbidae ; fascia transversa anticarum 

 grisea angusta, intus sinuata extus ferre porrecta, tenuiter dilute-ochraceo 

 marginata, pictura cetera valde obhterata, vix indicata, puncta centrale et 

 discoidale nulla. ? — 16 mm." 



From this description it will be seen that intercalaris is very different from 

 the Algerian Cerura, for intercalaris is described as having all the other markings 

 except the band almost absent, i.e. barely indicated, while the Algerian speci- 

 mens have aU these markings plainly shown, though they do not stand out so 

 boldly as in typical bifida, owing to the greyer ground-colour. 



Mr. Oberthiir states that the 3 5$ he considered to be bifida out of his 

 aeries of 7 Algerian Cerura belong to the form named by Boisduval in his Genera 



