THE CANADIAN ENTOMOLOGIST. 125 



NEW SPECIES OF DOLERIN^. 



BY ALEX. D. MACGILLIVRAY, ITHACA, N. Y. 



The writer has in preparation some synoptic tables of the eastern 

 species of Saw-flies. In this synoptic paper, it is not desirable to present 

 the descriptions of new species. This paper and some others to follow 

 later will include the descriptions of such new species as are to be included 

 there. 



Dolerus parasericeus, n. sp. — 9 • Surface of the scutellar appendage 

 entirely smooth ; pectus with three longitudinal rows of large punctures ; 

 antennal furrows with their outer edges continued by an elevated area to 

 the eye ; head rounded off between the vertex and the occiput ; the post- 

 ocular area with fewer, smaller punctures than the sides of the vertex; the 

 scutellum and the indexed portion of the lateral lobes of the mesonotum 

 with the punctuation similar in size and approximately similar in number 

 to the dorsal surface of the lateral lobes ; body dull black ; wings 

 infuscated, especially around the margins. Length, lo mm. 



Habitat : Ithaca, N. Y. 



Dolerus /leosericeus, n. sp. — $ . This species differs from the pre- 

 ceding in having the scutellum and inflexed portion of the mesonotum with 

 the punctuation larger and distinctly more numerous than on the dorsal 

 surface of the mesonotum ; antennal furrows behind the ocelli distinct and 

 sharply cut ; upper orbits with an impunctate area ; median lobe of the 

 mesonotum distinctly, more densely punctured than the lateral lobes; body 

 dull black ; wings fuliginous. Length, 12 mm. 



Habitat : Ithaca, N. Y., and Mt. KatahdiUj Maine (J. O. Martin). 



Dolerus polysericeus, n. sp. — $ . Pectus with three longitudinal rows 

 of large punctures ; antennal furrows not traceable below the lateral ocelli; 

 scutellum with fewer punctures than the lateral lobes of the mesonotum, 

 and its punctures twice their size ; postocular area more finely punctured 

 than the posterior orbits ; head with a carina between the occiput and the 

 posterior orbits ; body dull black ; wings infuscated. Length, 11 mm. 



Habitat : Ithaca, N. Y. 



Dolerus colosericeus, n. sp. — 9 • Surface of the scutellar appendage 

 smooth ; pectus with three longitudinal rows of large punctures ; antennal 

 furrows not traceable below the lateral ocelli ; scutellum and lateral lobes 

 of the mesonotum uniformly punctured as to size and number ; vertex 



April, 190S 



