CONTENTS OF VOLUME XI. 



Page 



Constitution of the Society 4 



The Entomological Society of Washington L. O. HOWARD... S 



New species of American Lepidoptera HARRISON G. DYAR... I'.i 



On the identity of Culex pipiens Linnaeus. 



HARRISON G. DYAR and FREDERICK KNAB... :><) 



Description of a New Mosquito from Cuba. 



HARRISON G. DYAR and FREDERICK KNAB... :;<i 



A Brief Note on Chalcodermus collaris Horn JAS. A. HYSLOP... 40 



The Copulating and Feeding Habits of Idiarthron atrispinus Stal 



A. N. CAUDELL .. 40 



New Chalcidoidea J. C. CRAWFORD... 51 



Descriptions of New Hymenoptera H. L. VIERECK... 4i' 



Notes on Some of the Eucnemida.' of the Eastern States. 



R. W. VAN HORN... 54 



A New Family of Parasitic Hymenoptera J. C. CRAWFORD... <;:; 



How Lysiphlebus Fastens its Aphid Host to the Plant. 



E. O. G. KELLEY... <;4 



The Role of Air in the Edysis of Insects FREDERICK KNAB... (is 



Boving's Studies of the Early Stages of Donacia.. AUGUST BUSCK... 7.'! 



Hemerobiidae from Queensland, Australia NATHAN. BANKS... 7f> 



Some Species of Calligrapha FREDERICK KNAB... s:; 



Notes on Microlepidoptera, with descriptions of North American 



species AUGUST BUSCK... s; 



Description of an Unidentified Notodontian Larva. 



HARRISON G. DYAH... 104 



Illustrations of the Life History of a Saw-fly (Hylotoma pectoralis 



Leach) Injurious to Willows E. A. SCIIWAK/.... !()(> 



Note on Extra Nymphal Molt of Argas miniatus. 



W. A. HOOKER... 10!) 



Miscellaneous Notes on Orthoptera A. N. CAUDELL... Ill 



Notes on the Family /Kgeriida- (Sesiidae), with a Synoptic Table 



of the North American Genera AUGUST BUSCK... lir> 



iii 



