16 NATURAL HISTORY BULLETIN 



NosoTETOCus Scudd. 



N. VESPERTiNus Scudd. Station number 14. One specimen, collected by 

 S. A. Rohwer. This shows the upper surface and indicates that the elytra 

 were punctured in rows as suspected by Dr. Scudder. 



Dryops Oliv. 



D. TENUiOR n. sp. (Plate III, Fig. 4.) Resembles D. eruptus from the 

 Florissant shales but is smaller and more slender. Head with microscopic 

 scattered punctuation. Eye small. Prothorax nearly straight in front, 

 sinuate behind, rather broader proportionately than in the recent D. 

 lithophilus, front angle produced beneath and partly covering the eye as in 

 that species, surface finely, microscopically, sparsely punctured, a littlo 

 more coarsely than the head. Scutellum small. Elytra mutilated at the 

 tip, sides subparallel, surface marked with rows of indistinct moderate-sized 

 elongate punctures. Legs long, claw-joints swollen. Length, 4.15 mm. 



Station number 14. One paired specimen, collected by Mrs. W. P. Cock- 

 erell. The type is in the Museum of the University of Colorado. 



This seems to be a good Dryops by all the visible characters and 

 in any event is closely related to that genus. The sketch shows 

 the outline and the courses of the elytral rows of punctures as 

 far as they can readily be distinguished. 



LuTROCHiTES n. gen. 



This name is proposed for a fossil insect of nearly the shape and size 

 of the recent Lutrochus luteus and of a similar velutine appearance. It 

 differs in the strongly longitudinally striate head and somewhat in the 

 punctuation as well. It is impossible to be sure of the family affinities, 

 but I have placed it here provisionally. The type is L. lecontei, described 

 below. 



L. LECONTEI n. sp. (Plate V, Fig. 4.) Form short and broad. Head 

 with the outline somewhat broken and the exterior margins of the eyes 

 damaged, but these organs were large. The vertex has about thirteen 

 strong and nearly equidistant longitudinal strias. Prothorax distinctly 

 broader than long, widest at base, sides more or less arcuate to the apex, 

 surface distinctly punctured, the punctures well separated but not distant, 

 a little stronger near the sides. Elytra about two and two-thirds times as 

 long as the median prothoracic line, sides subparallel anteriorly, posteriorly 

 arcuately narrowing to the apices which, separately, are acute, conjointly 

 they were perhaps sharply rounding. The elytral sculpture consists of a 

 fine, confused punctuation, but, like the whole upper surface of the body, 

 the wing covers have a velutine appearance. Length, 2.65 mm. Width, 

 1.75 mm. 



Station number 14. One specimen, collected by Mrs. W. P. Cockerell. 

 The type is in the American Museum of Natural History. 



