436 bulletin: museum of compakative zoology. 



but not widely separated. Hind coxae oval, transverse, contiguous 

 or nearly so. Abdominal segments subequal except the first and last 

 which are longer. 



Type. — P. tenuicornis, sp. nov. 



Protacnaeus tenuicornis, sp. nov. 

 Plate 4, fig. 5. 



Form short, stout. Head incompletely preserved but of large size. 

 Eye large, rounded. Antennae probably broken and with the joints 

 of the proximal half not distinguishable as such, those of the distal 

 half slender and about twice as long as wide. Prothorax broad at 

 base, narrowed to apex the sides poorly preserved. Elytron, seen 

 from beneath, showing traces of strial punctures, neither deep nor 

 coarse, the striae moderately distant, punctures round, those of each 

 row" separated by about their own diameters. Underside of trunk 

 not visibly sculptured. Legs wanting. Length, to tip of abdomen, 

 4.60 mm. 



Described from one specimen. 



Type— No. 2,466 M. C. Z. Florissant, Col. (No. 9,227 S. H. 

 Scudder Coll.). 



Like the other Florissant Dascyllidae, this species fails to agree very 

 well with the living forms. It seems to require a new genus for its 

 reception. It belongs to the Eubriini near Acnaeus which occurs 

 today on our Pacific coast. 



MioCYPHON, gen. nov. 



Body form similar to that of the elongate species of Cyphon. An- 

 tennae widely separated at base, 11-jointed, basal joint obscured, 

 second smaller than the third, third to seventh subequal, scarcely 

 serrate, distinctly longer than wide, eighth to eleventh longer, though 

 not excessively so, a little wider than those preceding. Coxae not well 

 defined on account of portions of the legs remaining in place, obscuring 

 the view, but the front pair were approximate or contiguous, the middle 

 well separated, the posterior nearly or quite contiguous. 



Type. — M. punctulatus, sp. nov. 



