H. F. WICKHAM 261 



Compared with recent North American species, this is most like 

 M. drummondi though different in the form of the prothorax and 

 the more finely sculptured non-costate elytra. It is easily dis- 

 tinguished from the Florissant fossil M. handlirschi by not having 

 pointed elytral apices and from M: cockerellae in being much more 

 slender. The under side of the prothorax has a reticulate sculpture 

 giving it a scaly look like that of corresponding parts on M. 

 drummondi. 



Necrobia sibylla sp. nov. (Plate V, fig. o.) 



Form only moderately elongate, sides subparallel. Head roughly semi- 

 circular in outline, the length, however, considerably less than the breadth, 

 surface finely and sparsely punctured. Antenna clavate, not reaching to 

 the pro thoracic hind angle, the individual joints not well enough pre- 

 served for description. Prothorax about one and two-thirds times as broad 

 as long, narrower at base, sides moderately arcuate, surface closely and 

 regularly, moderately deeply but not coarsely punctured, each puncture 

 with a minute point in the center which may mark the former attachment 

 of a hair. Elytra moderately long, apices rounded, punctuation fine and 

 deep but sparse and not arranged in striae. Legs short and slender. 

 Length, to abdominal apex, 5.85 mm. 



Described from one specimen collected by myself on the Wilson 

 Ranch near Florissant, Colorado. The type is in my collection. 



Likely enough this is not a true Necrobia, but there is nothing 

 upon which to base generic separation aside from the differently 

 shaped prothorax and the nature of the elytral punctuation. 

 This last is about like what we see in the recent Enoclerus abruptus 

 coccineus, but the fossil can hardly belong to the latter genus. 

 It is larger than N. divinatoria and differently proportioned as 

 will be seen by a comparison of the figures. 



GASTRALLANOBIUM gen. nov. 



Form about that of Gastrallus. Eye large, transverse. An- 

 tennae with long basal and short intermediate joints, club ap- 

 parently three-jointed, narrow. Prothorax strongly projecting 

 over the head, the sharp side margin much less oblique than in 

 Gastrallus and not deflexed anteriorly. Legs short. Elytral 

 sculpture punctato-striate. 



Type. — G. suhconfusum sp. nov. 



Gastrallanobium subconfusum sp. nov. (Plate VI, fig. 12.) 



Form moderately elongate, parallel. Head of moderate size, evidently 

 entirely concealed from above during repose, front just visibly punctured, 



TRANS. AM. ENT. SOC, XL. 



