IV TABLE OF CONTENTS. 



CusBMAN, R. A, Descriptions of new North American Ich- Page, 

 neumon-flies. No. 2284. June 7, 1919 * 517-543 



New genus: Cryptohelcostizus . 



New species: Habrobracon politiventris, Chrysopoctonus patruelis, 

 Myersia pallida, Aenoplex polychrosidis, Isadelphus extensor, 

 Panargyrops thoracicus, Spilocryptus exannulatus, Helcostizus 

 bicarinatus, H. rujiscutum, Cryptohelcostizus ruftgaster, Cryp- 

 toideus bicolor, C. rufus, Glypta mutica, Mesoleius balteatus. 



New name: Chrysopoctonus. 



New tribe: Proterocryptini. 



Dall, William Healey. Descriptions of new species of 

 Chitons from the Pacific coast of America. No. 2283. 

 June 7, 1919 ^ 499-516 



New subgenus: Semimopalia. 



New species: Lepidopleurus (Leptochiton) ambustus, L. (L.) hicurgus, 

 L. (L.) oldroydi, L. (L.) agesilaus, L. (L.) nicomedes, Nuttalina 

 allantophora, N. magdalena, Ischnochiton marvwratus, I. bryanti, 

 I. brunneus, I. listrum, I. ritteri, I. exanthematus, I. ophioderma, 

 I. acelidotus, I. mariposa, I. berriji, I. {Stenoplax) aethonus, 

 I. cooperi acutior, I. (Radsiella) aethalotus, I. eucosmius, I. venezius, 

 Chaetopleura lactica, Callistochiton acinatus, C. celetus, C. aepynotu^, 

 C. cyanosus, C. chthonius, C. fisheri, C. duncanus, Mopalia chloris, 

 M. goniura, M. celetoides, M. {Semimopalia) grisea, Acanthochitona 

 angelica, Tonica mixta, T. pustulifera. 



Ellis, Max M. The Branchiobdellid worms in the collec- 

 tions of the United States National Museum, with descrip- 

 tions of new genera and new species. No. 2267. May 2, 

 1919 "... 241-265 



New genera: Xironodrilus, Zironogiton. 



New species: Xironodrilus formosus, Xironogiton occidentalis, 



X. oregonensis, Pterodrilus mexicanus, P. durbini, Cambarincola 



vitrea, C. inversa, C. chirocephala. 

 l^ew subspecies: Xironogiton oregonensis pectinatus. 



Emery, W. T. See W. J. Phillips 433-471 



Fagan, Margaret M. See S. A. Rohwer 237-240 



Fisher, W. S. Five new species of Ptinid beetles. No. 



2271. April 26, 1919 1 295-299 



New species: Pitinus huesanus, Oligomeru^ arbuti, Ernobiu^ conicola, 

 E. californicus, E. champlaini. 



Gahan, a. B. New reared parasitic hymenoptera with 



some notes on sjaionymy. No. 2261. April 26, 1919*. .. 113-128 



New genera: Pseuderimerus, Heteroschema. 



New species: Phaeogenes (Centeterus) ineptifrons, Dacnu^a iridicola, 

 Trioxys cupressicola, Chelonu^ {Chelonella) proteus, Bassus im- 

 maculatus, B. usitatus, Apanteles stagmatophorae, Orgilus dio- 

 ryctriae, Pseuderimerus maystiolae, Heteroschema prima, Habrocytu^ 

 simillimus, Eutelus mayetiolae. 



' Date of publication. 



