INDEX TO VOLUME 23 



Acerentomon americanum, n. sp., 197; conurus, 



n. sp., 197. 

 Acerentuloides, new gen., 199; bicolor, n. sp., 



199. 

 Acerentulus oculatus, n. sp.. 198; tenuiceps, 



n. sp., 198. 

 Address of the retiring President, W. R. 



Walton, 69. 

 ALDEN, C. H. with B. A. PORTER: Anaphoidea 



conotracheli Girault an egg parasite of the 



Apple maggot, 62. 

 Ambopogon hyperboreus, Further notes on, 



107. 



Anapausis cismarina, n. sp., 124. 

 Anaphoidea conotracheli an egg parasite of 



the Apple maggot, 62. 

 Anomala aenea, Description of larva, 53. 

 Aphis, Origin of the word, 101. 

 Apple maggot. Eggs parasitized by Anaphoidea 



conotracheli, 62. 



Asilid fly, A new from the Madeira Islands, 208. 

 Axymyia, new. gen., 49; to be added to the 



Rhyphidae, SO; furcata, n. sp., 49, SO. 

 BAKER, A. C.: On the family name for the 



Plant lice, 101. 

 BARBER, H. G.: Revision of the genus Lygaeus 



Fabr., 63. 



Bombyliidae, A new genus of, 23. 

 BOVING, ADAM G.: The larva of Popillia 



japonica and a closely related undetermined 



Ruteline larva, 51. 

 BUSCK, AUGUST, and CARL HEINRICH: On the 



male genitalia of the Microlepidoptera and 



their systematic importance, 145. 

 Calopelta, new gen., 23; fallax, n. sp., 23. 

 Catantops viridifemoratus, n. sp., 32. 

 CAUDELL, A. N.: Some new Orthoptera from 



Mokanshan, China, 27. 



Cerambycid beetle, A new from California, 206. 

 CHAPIN, EDWARD A.: Remarks on the genus 



Hystrichopsylla Tasch., with description of 



a new species, 25. 



China, Some New Orthoptera from, 27. 

 Chrysochraon anomopterus, n. sp., 32. 

 Cicada, The mouth parts of, 1; Notes on, 211. 

 COCKRELL, T. D. A.: A new Asilid from the 



Madeira Islands, 208. 

 Conocephalus breviventris the prey of Tachy- 



tes, 103. 



CRAIGHEAD, F. C.: Larva of the North Ameri- 

 can beetle Sandalus niger, 44. 

 CRAMPTON, G. C.: Notes on the Ancestry of 



Hymenoptera, 35. 

 CRAWFORD, J. C.: A new species of the Chal- 



cidid genus Zatropis, 171. 

 CUSHMAN, R. A.: The males of the Ichneu- 



monid genera Myersia and Thaumato- 



typidea, with description of new species, 109. 

 CUSHMAN, R. A., and A. B. GAHAN: The 



Thomas Say species of Ichneumonidae, 153. 

 Desmocerus dimorphus, n. sp., 207. 

 -Diptera, Two new species of, 125. 

 Dipterous parasites of European corn borer, 



127. 



Dipterous parasites of Sawflies, 41. 

 Drymadusa mokanshanensis, n. sp., 34. 

 Entomological drawings and draughtsmen, 69. 

 Entomological Society of Washington : Address 



of the retiring President, W. R. Walton, 69. 



Eosentomon pallidum, n. sp., 195; vermiforme, 

 n. sp., 194. 



Epipleurotropis Girault a synonym of Pleuro- 

 tropis, 117. 



European corn borer, A dipterous parasite of, 

 127. 



EVVING, H. E.: New genera and species of 

 Protura, 193. 



Fernald, Charles Henry, Notice of death of, 68 



FISHER, W. S.: A new Cerambycid from Cali- 

 fornia, 206. 



Fox, William H., Notice of death of, 213. 



GAHAN, A. B.: Remarks on the genus Pleuro- 

 tropis, with description of a parasite of 

 Trachelus tabidus Fabr., 113. 



GAHAN, A. B., with R. A. CUSHMAN: The 

 Thomas Say species of Ichneumonidae, 153. 



Geea, new gen., 29; conspicua, n. sp., 30. 



Genitalia of the males of Microlepidoptera, 145. 



Goodia, A new species belonging to, 99; kahli, 

 n. sp., 99. 



Gooseberry sawfly, Homologies suggested 

 between larva and adult, 173. 



GREENE, CHARLES T.: A new genus of Bomby- 

 liidae, 23; Dipterous parasites of Sawflies, 

 41; Further notes on Ambopogon hyper- 

 boreus Greene, 107; Two new species of 

 Diptera, 125. 



HEINRICH, CARL, with AUGUST BUSCK: On the 

 male genitalia of the Microlepidoptera and 

 their systematic importance, 145. 



HERBERT, FRANK B.: The genus Matsucoccus, 

 with a new species, 15. 



HOLLAND, W. I.: A new species belonging to 

 the Goodia, 99. 



Homologies suggested between Sawfly larvae 

 and adults, 173. 



Hymenoptera, Notes on the Ancestry of, 35. 



Hystrichopsylla, Remarks on the genus, 25; 

 Key to the species, 26; mammoth, n. sp., 25. 



Ichneumonidae of Thomas Say, Neotypes of, 

 153. 



Lygaeospilus, new subgen., 65. 



Lygaeus, Revision of the genus, 63; Key to 

 subgenera and species, 63; Synonymy and 

 distribution, 67; rubricatus, n. sp., 65, 67. 



Machimus portosanctanus, n. sp., 208. 



Madeira Islands, A new Asilid fly from, 208. 



Male genitalia of Microlepidoptera, 145. 



Matsucoccus, The genus with a new species, 15; 

 Description of the genus, 15; Key to the 

 species, 16; acalyptus, n. sp., 20; fasciculensis, 

 20; matsumurae, 17. 



McATEE, W. L.: Description of a new genus 

 of Nemocera, 49; District of Columbia 

 Diptera: Scatopsidae, 120; The Periodical 

 Cicada, 1919; brief notes for the District 

 of Columbia Region. 211. 



Megaulacobothrus, new gen., 27; fuscipennis, 

 n. sp., 28. 



Melanotus hyslopi, n. sp., 210. 



Microentomon, new. gen.. 199; mimutum, n. 

 sp., 200. 



Microlepodoptera, On the male genitalia of, 

 and their systematic importance, 145. 



MIDDLETON, WILLIAM: Some notes on the 

 terminal abdominal structures of sawflies, 

 139; Some suggested homologies between 

 larvae and adults in sawflies, 173. 



214 



