SC/ENCEGOSS/r. 



297 



lUJTTlCRlLlES OF Till'". 



Al.AKARCTIC R1';GI0\. 



I'.v Hi:sRV Ciiaki.es Lanc, M.l)., M.U.C.S., L.k.C.l". Lund. 



(S^ontmued/rom page a66.) 



PA RN ASS I US {ionliiuicl). 



(iroiip (J. I,imi;aii Au^I. 



Thf nlicloniinal pouch in this iirciiip has liccii alkiclcd 

 lo on p. 171. There is (inly line sijucics. 



12. P. tenedius Kvcrsni. Hull. Mosc. 1S51. 

 Ausl. I'arn. 129, 175, pi. 13, lij;. 3. 



50—57 mm. 



The ground colour of Ihc wings is pure white. 

 F.w. with three distinctly black subcostal spots and 

 an ante-marginal band of round black spots arranged 

 as in P. apoltoniiis ; the spot near the in. luarg. is 

 represented by a black dot. II. w. In. nmrg. nar- 

 rowly deep black ; a faint trace of a red basal spot ; 

 the black row of ante-marginal spots is continued as 

 in f.w. Costal and central red spots present, but 

 small, and there is a small black dash on the outer 



edge of the disc, cell not seen in any other species. 

 U.S. h.w. with traces of three basal spots of a whitish 

 colour bordered with black, two red centred spots 

 near an. ang. ; the other markings as on upper side, 

 $ rather less clear white, the outer subcostal with 

 two small red spots. II.w. with a row of four red 

 centred .spots internal to the ante-marginal black 

 ones, and extending nearly from in. marg. to the 

 second nie<lian nervure. U.S. of h.w. witli the 

 ba.sal spots distinctly red ; the rest of the pattern as 

 on upper side. 



Hab. .\mur \'ir. ; Eastern Altai IV., \'. 

 Olekminsk on the banks of the Lena, and in 

 Daouria, Central Siberia VI. Not at great eleva- 

 tions. 



Ciroup/. Ven'TRICOSI Aust. 



This grotip contains more diversity of forms than 

 any of the preceding ones. The Palaearctic species 

 fall into three sections. 



SkcTION a consists of /'. iiordmainn and P. 

 clarius. Both these species have general appearance 

 of Group I. The wings are white with the markings 

 seen in tliat group, and with well-marked red or 



orange spots. KIwes, in writing of /'. c/ariiit which 

 he took on the Tchuja .Steppe, says : " I did not dis- 

 tinguish this from detiiis by its flight or appear- 

 ance till I had the female in my hand, when the 

 pouch at once showed what it was." (Trans. Knt. 

 .Soc. 1899, III. 314.) Neither /'. clarius nor /'. 

 iiori/maiini have any red basal spots on u.s. of h.w. 



Sec'IIO.N' B consists of P. eversmanni and /'. 

 fihUri. Both these species agree in the canary 

 yellow colour of the hairs which invest the body, 

 especially on the thorax and ventral surface. Both 

 species have red basal spots on the u.,s. of h.w. This 

 character is very faintly marked in /'. felderi, which 

 seems to form a transition lo the third section. 



Sf.ciion C, consisting of /'. miieiiwsyne, P. 

 sliihhendorfiii and /'. ciliinariiis, species within 

 which there is no trace of any red markings. In 

 the two latter all the markings characteristic of 

 Pariiassiiis, except the basal shading on h.w., are 

 absent or nearly so, the insects having a superficial 

 resemblance to I'ierids. 



The common character of this group is the peculiar 

 formation of the abdominal pouch as shown in the 

 figure of that of /'. sluhbendorfii on p. 171. 



23. P. clarius Kvcrsm. Hull. Mosc. 1S43, 

 in. 539. Aust. I'arn. 147, pi. 20, fig. i. 



60—64 """■ 



Wings white, f.w. with distinct marginal and ante- 

 marginal ban<ls. The latter are long and wavy, 

 reaching nearly to an. ang. Three subcostal spots, 

 the two internal ones deep black, the external grey 

 and semi-transparent. No red spots on f.w. Base 

 not shaded. II.w. with ou. marg. plain white, or 

 with a faint trace of a dentate pattern. Basal black 

 shading distinct, shaped n>uch as in P. ac/iiis. Near 

 an. ang. a variable black spot occasionally faintly 

 marked with red. U.S. as above, but glazed and 

 with less distinct markings. H.w. as above, without 

 any basal red spots, but with the spot near an. ang. 

 marked red. The red colour of the markings in this 

 species is a bright scarlet, sometimes inclining to 

 orange. 



II\B. Saisan (Central Asia), Siberia, Altai, Tar- 

 bagtai ; also in California. In the Palaearctic region 

 it seems to be confined to the Altai region, and does 

 not occur in the Amur or in the Tianclian .Moun- 

 tains. 



a. var. deulala Stgr. in litl. Austat. I'arn. 149, 

 pi. 21, fig. 1-2. Differs from the type in having a 

 distinct dentate p.attern along ou. marg. h.w. ; it is 

 at best an inconstant variety, and all degrees of varia- 

 tion between this and the type occur. IlAli. Saisan, 



