326 
Psyche 
[December 
differs from N eurotoma Konow by the narrow pterostigma, the more 
developed fore-branch of SC and the slender femora; it differs from 
Pamphilius Latreille by the post-ocellar area, which is enlarged 
forward, by the slender femora and the impressed area at the end 
of the last sternite of the female; it differs from Caenolyda Konow 
mainly by the short fore branch of SC. It is more similar to 
Acantholyda A. Costa and Cephalcia Panzer but it cannot be in- 
cluded in any of these genera with confidence since the main diagnostic 
features are indiscernible in the fossils. The small flagella seg- 
ments (smaller than the scape) of the fossil are more like those of 
Acantholyda ; we therefore place it provisionally in this genus. 
Figure 1 1 is based on specimens numbered 6307-6310; figure 12 
is based on the photograph of the holotype (made by F. M. Car- 
penter) ; in some details these two are not identical but the differences 
may be related to defects of preservation. 
Material examined: photograph of Holotype No. 18626 (Museum 
of University of Colorado, Boulder, Colorado), and specimens num- 
bered 6307-6310 (Museum of Comparative Zoology, Harvard 
University) ; Oligocene of Creede, Colorado. 
TA eurotoma cockerelli Rohwer 
Figure 13 
N eurotoma cockerelli: Rohwer, 1908a: 523. 
The reduced fore branch of SC, the broad pterostigma and the 
stout femora confirm the membership of this species in N eurotoma 
Konow. It differs from recent species by the occurrence of fore 
branches of the Y-shaped suture of the head. 
Material studied: photograph of Holotype No. 18869 (Ameri- 
can Museum of Natural History, New York), Oligocene of Floris- 
sant, Colorado. 
References 
Benson, R. B. 
1942. Blasticotomidae in the Miocene of Florissant, Colorado (Hymen- 
optera, Symphyta). Psyche 49: 47-48. 
Brues, C. T. 
1906. Fossil parasitic and phytophagous Hymenoptera from Florissant, 
Colorado. Bull. Amer. Mus. Nat. Hist., 22: 491-498. 
1908. New phytophagous Hymenoptera from the Tertiary of Florissant, 
Colorado. Bull. Mus. Comp. Zool., 51: 257-276. 
Cockerell, T. D. A. 
1906. Fossil saw-flies from Florissant, Colorado. Bull. Amer. Mus. 
Nat. Hist., 22: 499-501. 
