T. D. A. Cocker ell — Descriptions of Tertiary Insects. 311 



The Neinestrinids are divided into two groups, — those with, 

 and those without, an elongate proboscis. Palembolus jlori- 

 gerus Scudder, described many years ago, from the Florissant 

 shales, belongs to the first group : the two fossils now before 

 me belong to the second. It is not possible that either of the 

 latter represents Palembolus with the proboscis broken off or 

 concealed, as the venation does not by any means accord with 

 Seudder's description. I saw the type of Palembolus in the 

 Museum of Comparative Zoology last summer, but, as I now 

 much regret, I made no detailed examination of it. 



The new fossils are : — 



(1) Hirrnoneura melanderi n. sp. Miocene shales of Floris- 

 sant, Colorado, Station 14 ( W. P. Cockerell, 1907). Length 

 about 15|- ram , with the apical segments of the abdomen ex- 

 tended, so that the chitinous rings are separated; body black, 

 wings hyaline, slightly dusky; width of head 3f mm ; of thorax 5 mm ; 

 of abdomen about middle 4^ mm ; length of wing 10" im . Named 

 after Prof. A. L. Melander. Holotype in Yale University. 



(2) Hirrnoneura vulcanica n. sp. Miocene shales of Floris- 

 sant {Mrs. Charlotte Hill). In Yale University Museum. 

 Smaller and more slender ; length about 12 mm ; head and tho- 

 rax at least mainly black ; abdomen dark brown (probably 

 reddish in life), the hind margins of the segments having broad 

 entire light bands, about one-third the width of the segments 

 and extending more or less forwards at the extreme sides ; a 

 fine dark line borders the extreme hind margins ; width of 

 head and thorax each about 3 mm ; of abdomen about middle 

 4 mm ; wings hyaline, very faintly dusky, ll mm long. The wings 

 are much longer in proportion to the insect than in H. melan- 

 deri. Holotype in Yale University Museum. 



Palembolus floingerus is 19 mm long, with wings 12 mm ; pro- 

 boscis 12^ mm . In describing the venation I compare the fossils 

 with three living species : — 



(3) Hirmo?ieura clausa Osten Sacken. Texas. This is the 

 species figured in Comstock's Manual, p. 460, as Pynehoceph- 

 alus sackeni. I am indebted to Professor A. L. Melander for 

 the correction. 



(4) Hirrnoneura B. A new species from Texas, of which 

 I have the drawing of the wing, very kindly furnished by 

 Prof. Melander. 



(5) Nemestrina A. An undescribed species from Turkestan, 

 of which a figure has been kindly sent by Prof. Melander. 

 The Nemestrinids are to-day comparatively numerous in Turk- 

 estan and the adjacent regions, although so rare in North 

 America. 



The wing-characters may b3 best understood if taken one 

 by one : — 



(1) Costal cross-vein is barely beyond upper insertion of 

 first radio-medial cross-vein in Hirrnoneura B. and H. melan- 



