468 bulletin: museum of comparative zoology. 



to the elytral tips, first joint stout, oval, longer than the third, second 

 about two thirds the length of the third which is about two thirds as 

 long as the fourth, fifth a little longer, sixth, seventh, and eighth a 

 little shorter, ninth and tenth subequal to each other but not quite as 

 long as the eighth. Pronotum without lateral spines. Elytra with 

 rounded humeri, hind wings probably wanting or not functional. 

 Type. — P. vandykei, sp. nov. 



Protipochus vandykei, sp. nov, 

 Plate 9, fig. 5: Plate 10, fig. 3-4. 



Form resembling that of Ipochus or Parmena, surface finely trans- 

 versely wrinkled on head and pronotum and with vestiture of rather 

 short fine hairs. Head, including the jaws, a trifle longer than wide, 

 eyes not definable but probably not prominent in life. Antenna 

 moderately slender. Pronotum subequal at base and apex, sides regu- 

 larly rounded without spine or tubercle, the greatest width near the 

 middle where it exceeds the length by more than one-half. Scutel- 

 lum moderate. Elytra nearly smooth, and, as preserved, not quite 

 covering the abdomen, which, however, is probably somewhat abnor- 

 mally distended by maceration. Femora clavate, stout, tibiae 

 straight, finely hairy. Length, 5.70 mm. 



Described from one specimen. 



Type — No. 2,597 M. C. Z. Florissant, Col. (No. 10,870 S. H. 

 Scudder Coll.). 



This is a very interesting and puzzling little longhorn. From the 

 size of the head and the general facies, it would appear to belong to the 

 Lamiinae. The antennae are hard to match, however, and on com- 

 parison with specimens, figures, and descriptions of numerous foreign 

 and domestic genera I find nothing to agree exactly with them. They 

 differ from those of most of the genera in this vicinity by the short 

 third and long fifth joint and by the distal articles not decreasing 

 rapidly in length. They seem to resemble those of Michthysoma in 

 many respects, but the body form, thoracic armature, and coarse 

 sculpture of that genus are entirely foreign to the fossil. I have finally 

 concluded that Protipochus may go into Thomson's group Parmenitae 

 of his subtribe Dorcadionitae. This group comprises genera from all 

 of the continents and in North America is represented by the Califor- 

 nian genus Ipochus. Our fossil, while resembling Ipochus in outline, 



