REPORT OF THE SECRETARY: NATIONAL MUSEUM 105 



continued studies on the North American HaHctinae, particularly on 

 certain subgenera of the genus Ilalictus, during which she made 

 many dissections and from these permanent preparations for the 

 collection. She completed work on the North American Augochlora 

 and worked out a synoptic key to the North American Pemphredon. 

 William Middleton worked on sawllies and prepared descriptions of 

 some new species. 



A. N. Caudell published a report on the Orthoptera of the Pinchot 

 expedition; carried on some investigational work on neuropteroids, 

 in the course of which he prepared a description for one new species; 

 and studied specimens of Dccticinac from California. He finished 

 and submitted for publication an alphabetical index to the orthop- 

 terous insects of North America published subsequent to the year 

 1900 to and including 1925. 



Dr. H. E. Ewdng made taxonomic studies on both mites and suck- 

 ing-lice during the year, during which he completed for publication 

 four papers on the classification of various genera or groups. 



In Hemiptera H. G. Barber carried on investigations in a variety 

 of groups, including Nearctic and Neotropical Phymatidae, Neo- 

 tropical Coreidae, Notonectidae and Belostomatidae (with the assist- 

 ance of Prof. H. B. Hungerford), and Halobatinae, in connection 

 with the Carnegie Plankton expedition, and made considerable prog- 

 ress with the study of the races of the chinch bug {EUssus leucopterus 

 Say). P. W. Oman undertook preliminary studies in a number of 

 genera in both the Cicadellidae and the Fulgoridae. His most 

 important contribution during the year was an extensive paper on 

 classification of the North American agallian leafhoppers. Dr. P. W. 

 Mason continued liis study of the aphid tribe Macrosiphina. 



In the division of marine invertebrates, Dr. Mary J. Rathbun, 

 associate in zoology, was actively engaged in the preparation of the 

 fourth of her series of comprehensive monographs on American crabs. 

 In addition she determined nearly all the current sendings of recent 

 Brachj^ura and fossil Crustacea and submitted for publication a paper 

 describing seven new species from the Gulf of California. Dr. Waldo 

 L. Schmitt, curator, published a review of the distribution of the 

 larger fresh-water shrimps of the United States, and also prepared for 

 publication the new species in his report on the macruran and ano- 

 muran Crustacea of Puerto Rico and the Virgin Islands and an account 

 of two new species of p^xnogonids. A revision of the genus Emerita 

 was likewise submitted for publication. The assistant curator, 

 C. R, Shoemaker, completed several studies on amphipods; others he 

 has in progress, with a view to bringing taxonomic knowledge of tiiese 

 long neglected Crustacea up to date for the east coast of North 

 America. The report being prepared by J. O. Maloney, aide, on the 

 isopods collected in the course of the various expeditions that Capt. 



