WICKHAM: NEW MIOCENE COLEOPTERA FROM FLORISSANT. 477 



PLECTROTETROPHANES, gen. nov. 



General outline similar to that of Plectrotetra with which it agrees 

 also in the open front coxal cavities, the distinctly striatopunctate 

 elytra and the relatively slender hind femora. It differs especially 

 in the short antennae and the much more abbreviated prosternum 

 which allows the front coxal cavities to become widely confluent. 



Type. P. hageni, sp. nov. 



PLECTROTETROPHANES HAGENI, sp. nov. 

 Plate 12, fig. 4. 



Form moderately elongate but probably less so than would be 

 inferred from the figure since the specimen is preserved lying on its 

 back but somewhat askew. Head of moderate size, eyes rather large. 

 Antennae short for the Halticini, second joint more than half as long 

 as the third which is a little shorter than the first, the fourth to seventh 

 subequal and of nearly the same size as the third. Pro thorax much 

 broader than long, the exact proportions not ascertainable since only a 

 ventral view is shown and the sides are badly damaged. Prosternum 

 short and pointed between the coxae, rugose in front of them and not 

 visibly carinate. The prothoracic flanks are distinctly but finely 

 and sparsely punctate. Mesosternum rather narrowly separating 

 the middle coxae, side-pieces nearly smooth. Metasternum very 

 finely punctulate. Elytra showing through the abdominal segments, 

 strongly striatopunctate, the punctures circular and well separated, 

 the striae subequidistant. Hind femur rather slender though possibly 

 shown on edge. Abdomen finely punctulate. Length, 4.50 mm. 



Described from one specimen. 



Type. No. 2,642 M. C. Z. Florissant, Col. (No. 8,125 S. H. 

 Scudder Coll.). 



While the nature of the preservation of this insect obscures many 

 important features, it seems to be related to the Mexican genus Plec- 

 trotetra in the chief characters shown. None of our North American 

 Halticini with striatopunctate elytra approach it nearly so closely. 

 Compared with P. dohrnii from Jalapa, the fossil is more coarsely 

 sculptured and the striae of punctures are much better marked. Most 

 unfortunately the antennae are poorly shown, the joints beyond the 

 seventh all being lacking or mutilated, but what remains of these 



