l'J15 Pomona Journal of Enloniology atul 'loulogy, I oL I'll, No. 3, Sept. 
The Biology of tlie North American Crane 
FHes (Tipulidce Diptera) 
CHARLES PAUL ALEXANDER, 
* 
ITHACA, N. Y.' 
IV. The Tribe Hcxatomini. 
The tribe Hexatomini includes the four genera, Hcxaloma, 
CladoUpes, Eriocera and Pcnthoptcra, representatives being found 
in all portions of the temperate and torrid zones with the exception 
of the Australasian region. The Xearctic genera will be considered 
in the order given above. 
Hexatonl^ Latreille. 
This genus includes a small number of forms with a Holarctic 
distribution, there being thirteen European and one North Ameri- 
can species as yet described. Our fragmentary knowledge of the 
life-histories of members of this genus was indicated in a paper by 
Mr. Lloyd and the author. (The genus Eriocera Macquart, 1914 
Journal of Entomology and Zoology, vol. VI, 12.) 
Hexatoma megacera Osten Sacken. 
Hexatoma mecjacera Osten Sacken; Proc. Acad. Nat. Sci. Phila., 
242, 1859. 
This is the only Nearctic species as yet discovered. It is found 
throughout northeastern America, the distribution of the insect so 
far as known being as follows : 
Xen: York, Fulton Co., Sacandaga River, June 6-18, 1909; 
Johnstown, May 24, 1909 (Alexander) ; Tompkins Co., Ithaca, 
May 3-1 5, 1912 (Alexander). Coiiiieetiriit, Litchfield Co., Chapin- 
ville. May 26, 1904 (Britton). Maryland, Osten Sacken's type; 
Montgomery Co., Cabin John Bridge, April 28, 1912 (Malloch). 
District of Columbia, Washington, early spring, Osten Sacken's 
type. Firgiiiia, Fairfax Co., Glencarlyn, May 1, 1910 (Knab). 
*Coiitribution from the Limnological Laboratory of the Department of Entomology 
in Cornell Lniversitv. 
