Scudder.] 300 [September 25, 



the abdomen than are mentioned in the description of M. sbnplici- 



collis. 



Mesothemis Poeyi=Dythemis dicrota. 



My si)ecimens agree better with Dr. Hagen's generic description of 

 Mewtliemis than with that of Dylhemh. No mention of the humeral 

 stripe is made in his description of the species. 



Cordulegaster lateralis=C. Sayi? 



My speciuiens disagree with Dc Selys's description of C. Sayi* in 

 the markings of the abdomen, which is never annulated, but has spots 

 on the sides, approaching each otlier on the back; in the form of the 

 anal apjiendages, which, among other distinctions, have no basal in- 

 ferior tooth, but a median one ; in the color of the pterostigma, and in 

 the number of post cubltals. 



Cordulia eremita=C. albicincta? 



C. eremita is a larger species than C. albicincta ; the inferior ap- 

 pendage is scarcely more than half as long as the sujierior. In my 

 description I have not mentioned a serrate tubercle, situated near the 

 base of the outer edge of the superior appendage ; it is similar to the 

 median tubercle, but bent downwards, not at all outwards. 



Cordulia forcipata=C. arctica ? 



If the illustration given by De Selys and Hagenf is correct, C. 

 forcipata cannot be referred to C. arctica, on account of the form of 

 the superior anal ajipendages of the male. 



Mr. J. C. Merrill, Jr., announced the capture of Pieris 

 rapce, hitherto unknown in New England, at Waterbury, 

 Burlington and Stowe, Vt. ; the specimens were very abun- 

 dant at the former locality, exceeding in number the individ- 

 uals of P. oleracea, with which they were found in company. 

 He had also taken a single specimen at the White Mountains 

 in 1866 ; only one wing was preserved. The species has 

 been recorded in this country from Quebec only. 



Mr. S. II. Scudder stated that Mr. Sprague had recently 

 shown him specimens captured this summer in Lewiston, 

 Maine. 



* Monographic des Gomphines, p. 591. 

 f Revue des Odouates. PI. ii., fig. 1. 



