SAWFLIES FROM THE MARITIME PROVINCE OF 



SIBERIA 



By S. A. RoiiwER 



Of the Bureau of Entomology, United States Department of AgricuJiurc 



The following paper is a report on the sawflies collected in the 

 Maritime Province of Siberia by Prof. T. D. A. Cockerell and his 

 associates in the summer of 192-3. The collection contained 31 species, 

 28 of which are named specifically. Eleven sf)ecies and one variety 

 are described as new. 



Most of the new species show a verj'^ close aflinity to European 

 forms, and of the previously described species nine were originally 

 described from Europe. Three of the European species are here 

 recorded from Siberia for the first tune. One of the species liad 

 previously been known only from Japan; three of them were known 

 only from China, and one was known only from Formosa. Judging 

 from the sawflies alone we may say that the fauna of this maritime 

 province is essentially Palaearctic but with a slight southern infusion. 



MEGALODONTES (RHIPIDIOCEROS) SIBERIENSIS, new species 



This species seems to be most closely related to flahellicornis where 

 it runs in Konow's key, but the head and thorax have fewer pale 

 marks, the femora are dark, etc. 



Female. — Length, 10 mm. First joint of the flagellum subequai 

 with the three following and nearly as long as the two apical joints ; 

 the flabellation of the third joint as long as the three folloAving 

 joints; the flabellations of joints 3, 4, 5, 6, 7, and 8 are subequai; 

 petlicellum about half the length of the third joint; clypeus convex 

 medianly, the anterior margin truncate; antennal foveae sharply 

 defined, large, pointed above; postocellar area completely defined, 

 broader posteriorly, its length subequai with its greatest width; 

 postocellar line less than half as long as the ocellocular line; head 

 coarsely, closely punctuate except on the posterior orbits, where the 

 punctures are distinct and separated by a distance fully twice their 

 diameter; prescutum with large, close punctures posteriorly, ante- 

 riorly the punctures well separated ; scutum and scutellum irregularly 

 punctuate, the punctures sometimes confluent ; nervulus slightly post- 

 No. 2609.— Proceedings U. S. National Museum, Vol. 68. Art. 8. 



53655—25 1 1 



