486 bulletin: museum of comparative zoology 



ISOMIRA FLORISSANTENSIS, Sp. nOV. 



Plate 14, fig. 6-7. 



Form elongate oval. Head rather small, eyes not prominent. 

 Antennae long enough to reach slightly beyond the elytral bases 

 relatively a little stouter than in the recent species known to me and 

 with the third joint proportionately shorter. They are scarcely 

 serrate and the distal joints are a little shortened. Prothorax about 

 one and two thirds times as broad as long, sides regularly roundmg 

 to the apex which is much narrower than the base. Elytra each about 

 three times as long as wide, subparallel anteriorly to behind the middle, 

 apices conjointly rounded. Legs wanting except one of the anterior 

 pair which is of normal build. Length, from front of head to elytral 

 apex, 8.35 mm. 



Described from one specimen. nncuc A 



Type.— No. 2,682 M. C. Z. Florissant, Col. (No. .510 h. H. Scud- 



der Coll.). ^ . /n- , i 



This is strikingly like our common recent I. sencea, {tisleia sencea 

 Say) in appearance, but is_ larger. The weak sculpture of this genus 

 is not preserved in the fossil. 



Hymenorus haydeni, sp. nov. 

 Plate 14, fig. 8. 



Form moderatelv elongate and apparently subparallel although the 

 insect is preserved lying partly upon one side and the exact shape is 

 thus obscured. Head rather large, though neither as long nor as wide 

 as the prothorax, eyes of good size, somewhat narrowly separated, 

 surface sculpture obliterated. Antennae slender, the joints following 

 the third subequal in length, as far as shown, and fully twice as long as 

 wide If extended backward, the apex of the seventh jomt would 

 reach about to the basal prothoracic margin. Prothorax as preserved, 

 somewhat less than one and one half times as wide as long. Llytra 

 approximately three times as long as the prothorax, fairly sharp y 

 pointed at apex, surface very obscurely striate but without visible 

 punctuation. The entire insect appears to be scal)rous, but this is 

 pro])ablv due to the texture of the stone and the rather soft consis- 

 tency of the integuments before fossilization. Length, 7.15 mm. 

 Described from one specimen. 



