136 ENTOMOLOGICAL NEWS. [April, '06 



Leucorhinia hndsonica Selys. Bay of Islands, July 7, 1901, 

 4 $ and 4 9 . 



Sympetrum costiferum Hagen. A single 9 , badly damaged, 

 from Bay of Islands, July 7, 1901, apparently belongs to this 

 species. 



Libellula quadrimaculata L,. Bay of Islands, July 7, 1901, 



i 9 . 



Notes on some species of Somatochlora. Somatochlora semidr- 

 cularis, septentrionalis, artica and fordpata are a group of 

 closely related species with long slender abdomens and rela- 

 tively short wings. The difficulty in determining Dr. Atkin- 

 son's single $ of this group led to a study of these four species. 

 Of fordpata I have seen but two specimens, the headless speci- 

 men, collected by Dr. Atkinson, and a male in the Harvey col- 

 lection, S. Lagrauge, June 28, 1898, F. L. Harvey, collector. 

 The abdominal appendages of the Maine specimen seen in 

 profile, are much more strongly arched than in the Newfound- 

 land specimen. I have obtained from Mr. R. C. Osburn the 

 specimen mentioned by him as/ordpata, in ENT. NEWS, June, 

 1905, p. 191,* from Port Renfew, British Columbia. I refer 

 this specimen to semidrcularis. I am able to separate semidr- 

 cularis and fordpata only by the abdominal appendages of the 

 male. The Newfoundland fordpata is more slender than the 

 Maine semidrcularis (a difference pointed out by De Selys for 

 the two species), but the M.aineforcipata is about as robust as the 

 two specimens of semidrcularis which I have seen from that State 

 the one figured and a second from Orono, Maine, July 16, 

 1891, F. L,. Harvey, collector, referred to in ENT. NEWS, 

 May, 1892, p. 116, as fordpata. On the basis of this Orono 

 specimen, semidrcularis can be added to the New England 

 fauna. Scudder's description of fordpata fits the two speci- 

 mens which I have referred to this species in the form of the 

 appendages and in the presence on abdominal segment 5 and 

 the two or three following segments of a distinct basal, lateral 

 small yellow spot. These spots are wanting in the single male 

 of septentrionalis I have seen and in semidrcularis from Maine 



* In the same paper by Mr. Osburn, p. 192, lu- idfiitilifs two inijn rfecl ? of Svmpcti utn 

 as ubtrifiiDii. After a study uf buili spui-imcns I hclirxc they belong nilhrr to /<<?//// 



