abstracts: entomology 327 



tinct from all the other races of the species. It is here named Lanius 

 ludovicianus nelsoni in honor of Mr. E. W. Nelson, the Chief of the 

 Biological Survey. H. C. O. 



ORNITHOLOGY.— r/ze summer birds of the St. Matthew Island Bird 

 Reservation. G. Dallas Hanna. Auk 34: 403-410. October, 

 1917. 



The St. Matthew Island Bird Reservation consists of three islands — 

 St. Matthew, Hall, and Pinnacle. St. Matthew Island, which is 

 the largest of these, is some 22 miles long by two to three miles wide, 

 and rises to an altitude of 1800 feet. The weather-worn rocks are 

 either devoid of vegetation or covered with a scant growth of mosses 

 and other low plants. The information presented here was gathered 

 on a trip of investigation for the Biological Survey in July, 1916. Al- 

 together 37 species and subspecies are now known from these islands 

 including four reported only by Dr. A. K. Fisher in 1899. Of all 

 these only eight are land birds. Brief notes on the abundance and 

 manner of occurrence are added under each species. The beautiful 

 McKay snowflake, which is confined to these islands in the breeding 

 season, is, it is satisfactory to note, still here the most abundant land 

 bird of the level areas. Harry C. Oberholser. 



ENTOMOLOGY. — A revision of the North American Gracilariidae from 

 the standpoint of venation. Chas. R. Ely. Proc. Ent. Soc. Wash. 

 19: 29-77, P^s. 6-9. 1918 (issued Sept. 1919). 

 This paper presents a new arrangement for the North American 

 Microlepidoptera of the family Gracilariidae. It contains a generic 

 synopsis in which great stress is laid on the venation, especially the 

 position of vein 1 1 in the fore wings. Three new genera are charac- 

 terized and the other genera known to occur in our fauna are briefly 

 described. A catalog of the species and a list of the food plants of the 

 larvae adds to the usefulness of the paper. S. A. RohwER. 



ENTOMOLOGY. — Idiogastra, a new suborder of Hymenoptera with 

 notes on the immature stages of Oryssus. S. A. RohwER and 

 R. A. CusHMAN. Proc. Ent. Soc. Wash. 19: 89-98, pis. 11 and 

 12. 1918 (issued Sept. 1919). 

 The oryssoid Hymenoptera have long been recognized as a well- 

 defined group but with characters which indicated that they are in- 



