18 



NATUEAL HISTOEY BULLETIN 



Protoncideres n. gen. 



Form of Oncideres, to which it seems related. Prothorax unarmed at 

 sides. Antennae very long, (in what is presumed to be the male), abovxt 

 two and one-half times the body length. Front legs not elongate. Type, 

 P. primus, described below. 



P. PRIMUS n. sp. (Plate V, Fig. 4.) Preserved in ventraf vfew. Form 

 rather short and broad, subparallel. Head large, antennal tubercles pro- 

 nounced, antennae exhibiting only eight of the joints but these reach nearly 

 twice the length of the entire body; first joint large, obconical, second very 

 small, third a little more than twice as long as the first and equal to the 

 fifth, fourth a trifle shorter, sixth and seventh each about as long as the 

 fifth, eighth probably incomplete, the remainder wanting. The first and 

 second joints are strongly punctate, the punctiires distinctly transverse and 

 tending to form series in that direction, third joint more finely punctured, 

 the remainder apparently only finely roughened like the greater part of the 

 body surface. Prothorax without spines, under surface finely transversely 

 rugose, about as in the recent Monoliammus scutellatus. Elytra not quite 

 reaching the tip of the abdomen, (which was probably distended a little by 

 maceration), apices rounded, the surface punctate towards the base but not 

 strongly nor closely. Both inner and outer edges are apparently finely 

 margined, the former being in the shape of a sutural bead, the latter prob- 

 ably the epipleura. Legs moderate or rather short, the pairs subequal in 

 length, femora about as long as the tibiae, the former not strongly clavate, 

 the latter about straight and with no expansions nor teeth. Tarsi obscure. 

 Length, 19.25 mm. 



Comparisons with a large number of Cerambycidse from 

 North America, Europe and other parts of the world, give no 

 clue to any very close relationships with this fossil. It seems, by 

 the large head and immarginate prothorax, to be a Lamiide. 

 The elongate antennae suggest the Acanthoderini or Monoham- 

 mini, but the lack of spine or tubercle upon the thoracic sides is 

 uncommon in these groups. If it were not for the fact that the 

 anterior legs are not elongate in my specimen (which, judging 

 by the antennge, is a male) it might be considered near Pty diodes, 

 but so far as the visible characters permit the formation of an 

 opinion, I think it best to place the insect between Saperda and 

 Ojicideres. 



Cryptocephalus Geojf. 



C. MiocENUS n. sp. (Plate V, Fig. 5.) Form fairly stout. Head bent 

 up, but as it is shown from the under side it displays no features of inter- 

 est. Antennae visible only at the base, slender. Elytra conjointly a little 

 more than four-fifths as wide as long, strongly and deeply punctatostriate. 

 Length, 4.65 mm. 



