422 HOLCOCERUS. By Dr. A. Seitz. 



mens from the Ussuri and other quite similar ones which I obtained tlirough Klaphek from Jenchou-fu, are 

 hisularis. smaller and darker and described as insularis Stgr. (53 e), forming a direct transition to consohrinus. 



drangiani- H. drangianicus Gr.-Grsch. Closely alUed to arenicola, but differing in size (37 mm) as well as co- 



cks, lourmg and markings. Fore^ving above dirty white marbled with black and with a network of striae, slightly 

 darker in the middle, hhidwing dirty white with darker fringes. — From Seistan. 



ussiiriensis. H. ussuriensis Graes. Also closely allied to arenicola, but somewhat slenderer, forewing more elongate, 



its hind edge less emarginate before the hind angle. Colour dark smoky grey, forewing lighter in the marginal 

 area, the reticulation more minute than m the otherwise very similar arenicoh and Cossus terebra. A light 

 spot at the apex of the cell. Hindwing still darker, somewhat lighter in the cell, fringes with dark dividing 

 line. — Described from a (J from the Ussuri. 



putridus. H. putridus Christ. (53 b). Similar in size to insularis, but the wings broader, the outer margin 



less rounded, the hindwing larger, with longer frmges. Markings coarser than in arenicola, the colouring 

 as dark as m insularis. — From Turan. Was described as a Holcocerus by Christoph, but placed in Cossus 

 by Staudinger-Rebel in spite of the fact that the figure of the ^ in Romanoff's "Memoires" does not permit 

 of any doubt as to the structure of the antennae, a proof of the artificiality of the separation oiCossiis and 

 Holcocerus. 



mucosus. H. mucosus Christ. , not imlike putridus, but rather larger , forewing more dirty grey , all 



veins in the basal area prominently white and the median branches connected by a white transverse bar; 

 there is also a white transverse bar rmmmg from the submedian to the hindmarginal vein. On the whole rather 

 like Hyp. caestrum. — Askhabad, Nuchur, in June. 



mus. H. mus Gr.-Grsh. Thorax clothed with grey hair, abdomen light mouse-grey, greater part of forewing 



above dirty white, densely dusted with mouse-grey and yellowish towards the outer margin, two but slightly 

 distinct abbreviated oblique bands. Hindwmg light mouse-grey, darker basally; all frmges chequered with 

 white and mouse-grey. — Described from $$, which measure 30 to 32 mm. From the Persian province Makran. 

 Altogether six forms of Cossus have been described from Persia. But as each is described without reference 

 to the others, as no morphological distinctions are mentioned, and, moreover, the authors had only one or 

 two specimens, it is impossible to say anything definite about these forms, it bemg doubtful whether (accord- 

 ing to the generic separation still holding good to-day) they really belong to Holcocerus. 



praedarua. H. praeclarus Pilng. (53 e). From Tura. A larger and light species with ashy grey forewing and 



dull whitish hindwing. It is clo.sely allied to the followhig, pulverulentvs, but instead of the small streaks between 

 the veins it has a submargmal line runnmg parallel with the outer margin; the frmges of both wdngs distmctly 

 chequered. But above all the antennae are not very long and whip-like as m piilverulentus, the abdomen 

 of the cj is flatter and the anal tuft narrower. ■ — From the steppes of Anterior Asia, from Merv. We figure 

 the type from coll. Pungeler. 



' pulveru- H. pulverulentus Pilng. (53 e). The differences are already mentioned under the preceding species; 



kntus. they consist especially in the very long pointed antennae and the comma-shaped spots between the veins, which 

 are not always so distinct as in the figure. Underside dull white, in some specimens entirely without markings, 

 in others with checks along the costa of the forewing. — Like the preceding from Merv. 



campicola. H. campicola Ev. (53 e). Size and shape of pulverulentus, but the entire colouring dull greyish brown 



instead of light grey. The forewing somewhat broader at the apex, its outer margin, especially the hind angle, 

 more rounded, the antennae moderately long. The stripes between the vehis nearly as in pidverulentus, but 

 difficult to recognise on account of the darker ground-colour, or may disappear entirely in the ground-colour. 



— Steppes of Central Asia, Turkestan. 



volgensis. H. volgensis Christ. (53 e). Very like the preceding, and of the same earth-browii colour; markings 



and striation more distinct; especially in the marginal area there is a line consisting of small dark striae; 

 chequeruig of friiiges darker, as is also the costa on the underside of the forewhig. Appears to be met with more 

 frequentely only near Sarepta, whence our specimens also came. — The only Holcocerus found in Europe, 

 excepting arenicola. 



inspersua. H. inspersus Christ. (53 f). A small insect from Turkestan, resembling Cossus tapinus m facies, es- 



pecially in the long abdomen. The forewing is a delicate silvery grey, slightly variegated with yellowish 

 grey, and bears a few light dots, and often a somewhat larger one at the apex of the cell ; hmdwuig almost 

 pure white; the long fringes of the forewing chequered with bright brown. Antenna of ^ comparatively long. 



— From Merv. 



moUia. H. mollis Christ. (53 f). This species and the two following occur m Turkestan; they are true inhabi- 



tants of the steppes, and are most often foimd by collectors "mothing" at night or hunting for beetles or cater- 

 pillars on the tufts of grass of the steppes. Like the preceding, mollis is grey, forewing along the costa, me- 



