TABLE OF CONTENTS. VII 



Merrill, George P. Report on some carbonic acid tests Page, 

 on the weathering of marbles and hmestones. No. 2108. 

 July 26, 1915 1 347-349 



Oberholser, Harry C. A synopsis of the races of the 

 crested tern, Thalasseus bergii (Lichtenstein). No. 2121. 

 December 23, 1915 ^ 515-526 



New subspecies: Thalasseus bergii halodramus. 

 Critical notes on the subspecies of the spotted owl, 



Strix occidentalis (Xantus). No. 2106. July 26, 1915 K 251-257 



Pearse, a. S. An account of the Crustacea collected by 

 the Walker Expedition to Santa Marta, Colombia. No. 

 2123. December 23, 1915 ^ 531-556 



New genus: Minca. 



New species: Cubans brevispinis, Minca ruthveni, Sphaeroniscus 

 gaigei, S. colombiensis, Ligyda richardsonae . 



Rohwer, S. a. Descriptions of new species of Hymenop- 



tera. No. 2105. July 16, 1915 ^ 205-249 



New genera: Cimbicisoma, Xylocelia. 



New species: Erajphytina vanduzeei, Dimorphopteryx coloradensis, 

 Tenthredella turneri, Pachyprotasis brunettii, Pontania amentivora, 

 Pteronidea aceris, Lygaeonematus robinsonae, Croesus castaneae, 

 Exiura cosensii, Cimbicisoma dendrobii, Pezoporus (Schenkia) 

 tenthredinarum, Lagarotis diprioni, L. virginianus, HowMlomma 

 caliroae, H. eriocampoides, H. pteronideae, Gnesia caliroae, Poly- 

 terus caliroae, ExenUrus diprioni, Moerophora neoclyti, Am£rsibia 

 prionoxysti, Scambus evetrivorus, Camposcopus aclerivora, Apan- 

 teles (Apanteles) sibinidis, A. (Protapanteles) phobetri, Gnamptodon 

 nepticulae, Phanerotoma laspeyresia, Bassus coleophorae, Micro- 

 bracon coleophorae, M. hemim£nae, Trissomahis fulvicornis, Elis 

 xanlhonotus, Campsomeris (Campsomeris) pyrura, Ceropales 

 neomexicana, Batazonus hookeri, B. mundi/ormis, Odynerus 

 (Stenodynerus) blawus, 0. (S.) odontoschius, 0. (S.) anacardivora, 

 0. margaretellus , Psen {Miinesa) modesta, Larropsis gracilis, L. 

 dolosana, Pison aureosericeum, P. (Parapison) erythrogastrum, 

 Nysson (Bathystegus) basirufus, Cerceris margaretella. 



New variety: Odyrw-v^ {Stenodynerus) odontoschius, var. dichrous. 



New name: Blennocampa assamensis. 



Snyder, John Otterbein. Notes on a collection of fishes 

 made by Dr. Edgar A. Mearns from rivers tributary to 

 the Gulf of California. No. 2125. December 23, 1915 K 573-586 



New species: Notropis mearnsi. 



' Date of publication. 



