110 
Psyche 
[June-Sept. 
in about the middle of wing area, with numerous branches, 
to posterior margin of wing. 
Length of wing — 6.5 mm. 
Width of wing — 1.7 mm. 
Wing smaller than in Reticulitermes fossarum Scudder 
from Florissant, Colorado, in Miocene shale. 
Holotype : Museum of Comparative Zoology, No. 4472 ab; 
collected in the Miocene shales at Creede, Colorado. 
Order Diptera 
Family Tipulxdae 
By Charles P. Alexander 
Massachusetts State College 
I am greatly indebted to Dr. F. M. Carpenter for the 
privilege of studying the series of Tipulidae collected by him 
at the fossil beds located near Creede, Colorado. As indi- 
cated elsewhere by Dr. Carpenter, the Creede formation is 
of approximately the same age as the Florissant shales 
(Miocene), about a hundred miles to the northeast, near 
Pikes Peak, Colorado. 
All of the specimens pertain to the single genus Tipula 
Linnaeus and virtually all seem to belong to a single species 
that I am herewith describing as new under the name Tipula 
carpenteri. In almost all of these individuals, the wings are 
the only parts that are well preserved. Throughout the vast 
complex of forms now included within the limits of the genus 
Tipula (approximately 1000 species, Recent and fossil), the 
wing venation is singularly uniform and offers but slight 
aid in the subdivision of the genus into smaller groups. In 
the recent fauna, the definition of species in this genus 
is based in great part upon the structure of the male 
hypogygium, characters that are quite unavailable in the 
present fossil series. A careful analysis of wing-pattern 
and venation has been made since any determination of the 
present series must depend chiefly or solely upon such 
characters. 
More than a score of fossil Tipula and closely allied groups 
have been described from the early Tertiary of western 
