FOSSIL COLEOPTERA 21 



Elytra obtuse at tip. other details of outline not definable, ornamented wit'i 

 granules similar to those of the prothorax, arranged in about fifteen fairlv 

 well-defined series, which, however, become confused near the apex. These 

 granules are separated in the series by much less than their own diameters, 

 but the interserial spaces are a little wider as a rule. Femora moderate, 

 the remaining parts of the legs wanting. Length, 14..50 mm. ; of head, 

 2.2.5 mm. ; of prothorax, near upper margin, 4.75 mm.; of elvtron, 8.8.5 mm. 

 Width of head, 3.25 mm.; of flattened elytron, near middle, 3.50 mm. 

 Height of prothorax. 3.75 mm. 



Florissant, Colorado, collected by Mrs. C. Hill. The holotype is in the 

 Peabody Museum of Yale L'niversity. 



Since the specimen is a reverse, the granules, of course, repre- 

 sent punctures, and vice versa. "We have indicated, then, an in- 

 sect of about the size of the recent Apafides forfis Lee. the an- 

 terior margin of the prothorax similarly strongly, sharply as- 

 perate, the head rugose in like manner and the eh'tra deeply, 

 strongly, seriately punctured in the same vray. the little mam- 

 milla? seen at the bottom of some of these punctures being repre- 

 sented in the fossil by small pits at the apices of the granules. 

 But in P. conforta the principal diseal prothoracie area, with most 

 of the sides and posterior portions, are strongly punctate instead 

 of being granulate or asperate, reproducing on a larger scale and 

 with some difference of detail the sculpture of those parts in 

 Micrapafe dinocUroides. What little can be seen of the legs. 

 agrees -with the corresponding structures in A. fort is. "While the 

 generic characters set forth are not in themselves of any great 

 importance, it is probable that the insect was not a true Apa- 

 iides, and it has seemed better to separate it. 



Xylobiops Casey. 



X. LACUSTRE n. sp. (Plate Y, Fig. 6.) Form moderately elongate. Head 

 long, eyes and antennae not definable. Prothorax projecting over the head, 

 the front margin somewhat produced, surface roughened, anterior declivity 

 with about four transverse rows of asperities. Elytra declivous and pointed 

 at apex, a moderate sized sharp tooth near the top of the declivity, disk 

 punctate with close rows of circular somewhat approximate punctures. 

 Legs wanting. Length from front of prothoracie margin to elytral tip, 

 5.35 nun. 



Station number 14. One specimen, collected by S. A. Rohwer. The type 

 is in the American Museum of Natural History. 



There seems no reason to doubt that this insect is properly 



