WICKHAM: NEW MIOCENE COLEOPTERA FROM FLORISSANT. 475 
Type.— No. 2,632 M. C. Z. Florissant, Col. (No. 3,931 S. H. 
Scudder Coll.). 
The characters shown are those of Trirhabda, though at first sight 
the specimen does not give the impression of belonging to that genus 
which is well represented in North America today. 
The size is about 
equal to that of 7’. convergens or 1’. attenuata. 
TRIRHABDA MEGACEPHALA, Sp. nov. 
Plate 12, fig... 2. 
Form elongate, parallel. Head large but not so wide as the pro- 
thorax. Eyes not well defined. Antennae damaged but showing six 
of the intermediate joints which are slender, not serrate, subequal, 
each a little more than twice as long as wide. In life, the antennae 
must have reached at least to the middle of the elytra and probably - 
beyond that point. Prothorax badly injured but what remains shows 
: it to have been not far from twice as broad as long. Scutellum small. 
Elytra four times as long as the prothorax, apices rounded. Abdomen 
showing five nearly equal segments which can be seen through the 
elytra. Legs wanting. Length, to elytral apices, 8.70 mm.; of the 
elytra 5.80 mm. 
Described from one specimen. 
Type.— No. 2,683 M. C. Z. Florissant, Col. (No. 3,166 S. H. 
Seudder Coll.). 
| The entire upper surface is minutely punctulate and finely hairy. 
The size and form are those of Trirhabda and it seems proper to place 
it here provisionally. 
TRIRHABDA MAJUSCULA, Sp. Nov. 
Plate 12, fig. 1. 
Form moderately elongate. Head abnormally exserted, rounded, 
minutely punctulate and clothed with fine, dark, short, close hair. 
Nyes rounded, widely distant on the vertex. Antennae slender, not 
serrate, the individual joints too poorly preserved for description. 
Prothorax about one and one third times as broad as long, sides 
rounded, apex and base more or less truncate, surface minutely 
pe and clothed similarly to the head. Scutellum broad. 
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