146 



[June, 



PERLIDM TAKEN IN NORWAY IN JUNE AND JULY, 1900, WITH 

 REMARKS ON CERTAIN ARCTIC FORMS. 



BY KENNETH J. MORTON, F.K.S. 



Referring to page 31 of the current voliinie, I now submit a list 

 of Perlidcp taken in Norway in June and July of last year. 



The VerJidce of that country are by no means unknown. Sohciyon 

 seems to have collected them in some numbers and in many localities, 

 but our recent information as to Norwegian Perlidw is mainly the 

 result of the extensive and energetic collecting of Ilerr Embr. Strand, 

 whose materials have been worked out with care and accuracy in the 

 Veriiandlungen der K. K. zool.-bot. Ges. in Wien, 1900, by Dr. Peter 

 Kempny, of G-utenstein. 



Mv own captures comprise four species not included in Dr. 

 Kempny's list ; and I was also fortunate enough to find two of his 

 novelties. Some of ihe insects tal<en have suggested one or two 

 points connected with species from other Arctic localities. 



DiCTYOPTERYX. 



1. compncta, McL. 



On tlip last (lay of our slnj at Folvstiipn, on tlio Dovrofjold, by tiirninir over 

 stonrs at the rapirl Foksaa, I found two oxaniples of a micropterons S Dicti/nptpri/x 

 (Ienp;th of fore-wing, 12 mm.). The condition of tlie insects is teneral,and th(M'pforp 

 not so satisfactory as is desirable with respect to colour, the characteristic markings 

 of till' head and pronotum being pale yellowish or whitish. On account of Ihe 

 somewliat unusual condition of the wings (microplerisni being much less frequent 

 in the 9 than in the S in PprJidrp) I was inclined to describe the insects as new 

 under the name donrenais. Further consideration of the subject leads me to doubt 

 the prudence of this course ; and I now believe that they represent a local form of 

 the species which T received long ago from Dr. John Sahlberg from the Kola penin- 

 sular, and which Mr. McLachlan tliougli( might be his compucta, an opinion I 

 agreed with after having seen the types. 



The Kola insect (S micropterous, while the ty]jieal ^ has effective wings) has 

 (he lanceolate markings on the head much broader than is usual in Dictijopteryx. 

 The colour of the adult markings is rich orange, which in the <? has a very decided 

 tendency to cover the whole hind head, and to spread along the sutures and niai-gins 



l^_____ ^ _. f of the liead and to the frons, which has a yellow 



triangle. In the ? this colour does not spread 

 so much. 



The anal parts of the Kola ^ are very com- 

 plicated, and I give a figure of them as seen from 

 above. Seen from beneath the last ventral plate 

 appears to be somewhat pointed, and this is 

 accentuated as a rule in drying ; further, in 

 •several examples the plate is continued by what 

 appears to be a yellowish, hardened, upturned 



