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UNITED STATES NATIONAL MUSEUM
UNDER THE DIRECTION OF 
THE SMITHSONIAN INSTITUTION
WASHINGTON

1891-2

L. O. Howard, A Note on Parasites.  
Insect Life Volume IV double number 1 & 2 October 1891 pp.48-49.
A number of instances are given of error in the determination of the relations between host insect and parasite and the frequent causes of error are pointed out and the necessity for great care insisted upon.

L. O. Howard, The Larger Corn Stalk-borer.  (Ill'd.)  
Insect Life Volume IV double number 3 & 4 November 1891 pp.95-103.
Historical account and life history of Diatraea saccharalis detailing particularly its damage to corn and giving new food-plants and remedies.

L. O. Howard, The Methods of Pupation Among the Chalcididae.  (Ill'd.)  
Insect Life Volume IV double number 5 & 6 December 1891 pp.193-196.

L. O. Howard, The Habits of Elasmus.  (Ill'd.)  
Insect Life Volume IV double number 7 & 8 March 1892 pp.253-254.

L. O. Howard, The Biology of the Hymenopterous Insects of the Family Chalcididae..  (Ill'd.)  
Proceedings U.S. National Museum Volume XIV pp.567-588 except No.881.  Published 1891.
A general consideration of the biology of the Chalcididae under the following sub-heads:  The insects and stages of insects infested by Chacidids;  How the Chalcidid larva lifes;  How fast does it develop?  How the larva transforms;  How many develop in a single host?  Proportions of sexes in issuing;  Phytophagic habit;  Parthenogenesis;  How large is the family.

L. O. Howard and C. V. Riley, See Riley and Howard.  Tr to following page