Wiokham — JYew Fossil Coleoptera from Florissant. 51 



Ologlyptus Lacordaire. 



0. primus n. sp. The rather poorly preserved specimen 

 indicates a species of moderate size and probably flattened 

 form, approximating that of our recent O. anastomosis. The 

 prothorax is broadest near the middle, sides regularly round- 

 ing, apex considerably narrower than the base but owing to 

 incompleteness of the specimen the exact proportions cannot 

 be given. Head obscured, antennae with the median joints 

 about as broad, as long. Elytral sculpture apparently rough, 

 but no details can be made out. Legs wanting. Length of 

 specimen, which lacks a small portion of the tip of the elytra, 

 7*25 mm ; of prothorax about 2 - 15 mm ; width of elytra, conjoint, 

 3-65 mm ; of prothorax (distorted?), 2'75 mm . 



Station number 13. Collection number 154, Florissant 

 Expedition 1906. Received from Prof. Cockerell. Holotype 

 in the Peabody Museum of Yale University, Cat. _N"o. 16. 



The generic reference is not made with any great certainty, 

 but the facies is decidedly that of several recent species of 

 Ologlyptus, with wmich it has been directly compared. The 

 prothorax appears to have the basal margin extending farther 

 backwards than the points of the hind angles, much as in the 

 Mexican 0. simiaticollis but to an even greater degree. 



Macratria ¥ewm. 



M. gigantea n. sp. Form elongate, head small, short, 

 jDrothorax very long and narrow, elytra conjointly much broader 

 than the prothorax, sides subparallel, apices rounded, surface 

 finely, distinctly and rather closely striate, the striae finely, not 

 closely punctured, interspaces flat. Middle leg not elongate 

 and only moderately stout. Antennae showing only a few 

 intermediate joints which are sufficiently . well preserved to 

 indicate that they are longer than wide, but not greatly 

 elongate. Length from front of head to tip of elytra, but 

 exclusive of projecting abdominal organs, 8 mm . Length of 

 head, as preserved, l mm ; of prothorax, 2'10 mm ; of elytra, 5*10 mm . 

 Width of prothorax about l"50 mm , of elytra, conjointly, 2*50 mm . 

 The articulations of the leg joints are not well enough defined 

 to permit of accurate measurements. 



Station number 14. Collection number 9, Florissant Expedi- 

 tion 1906. Received from Prof. Cockerell. Holotype in the 

 Peabody Museum of Yale University, Cat. No. 17. 



The specimen has a decidedly Anthicide look, and in build 

 as well as sculpture resembles our recent North American 

 species of Macratria though far exceeding them in size. 

 Possibly it may represent an extinct allied genus, but no 

 characters are evident upon which to base a separation. 



Iowa Citv, Iowa. 



