T. D. A. Cocker ell — Descriptions of Tertiary Insects. 75 



backwards of radial and median supplements (see Coryphce- 

 sclina ingens for maximum of both characters, and Nasiwschna, 

 e. g., for minimum)." Mr. Williamson concludes that separata 

 cannot go in Basioeschna ; and unless a new genus is proposed 

 for it, Hoplonceschna seems to be the only genus to receive it. 



Phenacolestes pavallelus Ckll. 



This species was described from the apical part of the wing. 

 The base of a wing, probably belonging to P. parallehcs, is 

 from Station 14 (Geo. J¥. Rohwer). It differs from P. 

 niirandiis Ckll., in having six antenodal cross-nervures, the 

 nervure from subquadrangle to lower margin arising from 

 almost the apex of the former, and cross-nervure in fork of 

 M 1+2 and M 3 before level of nodus. The part visible (as far 

 as separation of M, from M 2 ) is hyaline. 



(10) A Longicorn Beetle from Florissant. 

 Saperda (?) submersa sp. nov. Figure 4. 



Length about 22 mm ; width of head about 4|-; width of 

 thorax about 4 ; of insect in humeral region of elytra about 

 7-J- ; length of head and thorax about 6J mm ; antennse rather 

 thick, probably about 16 mm long, but the extreme tip missing. 

 Head dark above, but face and mouth pallid ; thorax ± 

 ' pallid, darker posteriorly ; elytra black at base (espe- 

 cially on humeri), after which comes a broad (about 

 4| mm long) light area, forming a broad band across both 

 elytra, the remaining portion of the elytra black. 

 Abdomen extending a little beyond tips of elytra. 



In general build and appearance, this is like Saperda. I can- 

 not demonstrate any lateral spines on thorax and believe there 

 were none, but this part is not very clearly visible. The 

 transverse light area on the elytra recalls Oncideres cingulatiis, 

 although more basal than in that insect ; the antennas are like 

 those of Saperda, not like Cncideres. The rather broad head 

 suggests Mecas rather than Saperda. Type from the Miocene 

 shales of Florissant, Colorado, collector unknown. Mr. G. L. 

 Cannon, who kindly placed it in my hands for description, 

 informs me that it has been in the collection at the State 

 Capitol for at least 25 years. 



Four fossil species of Saperda have been described from 

 Europe. Three are from the Miocene, but one of these 

 (S. valdensis Heer) is not identifiable. 



University of Colorado, Boulder. 



