222 



LiTHADOTHRIPS VETUSTA, nov. Sjp. 



The specimens, both of which represent the upper surface of the body 

 with fragments and vague impressions of the members, are too poorly- 

 preserved to add anything to the above description of their generic 

 features excepting the following measurements : First specimen : length 

 of body, l™"i.76 ; of antennae, O'^^.G; of thorax, 0°»'^.64:; of abdomen, 

 O^^^^.S? ; breadth of head, 0'"°\28 ; of thorax, 0°^°^.52 ; of abdomen, 0°»'».56; 

 length of fore femora, 0™°^.37 ? ; breadth of same, 0'"°^.14 ; length of hind 

 femora, 0°^°'.42 ; breadth of same, O^'^.IS. Second specimen : length of 

 body, l^'^.OG; of antennae, 0'^°^.76; of thorax, O'^^^-SG; of abdomen, 

 I'^'^.IO; breadthof head, 0>^^.38; of thorax, 0™"^.59 ; of abdomen, 0™^.59. 

 Fossil Caiion, Professor Denton. 



PAL^OTHRIPS Scudder. 



This genus, hitherto but briefly described, is allied to JEolothrip^ 

 Haliday. The Lead is small, globose ; eyes rounded, much smaller than 

 in Liiliadothrips ; antennae slender, fully as long as the thorax, not 

 more than seven-jointed, the joints cylindrical, subequal. Prothorax 

 considerably larger than the head, the thorax, as a whole, very large, 

 stout, and tumid ; fore femora very stout, scarcely more than twice as 

 long as broad; fore tibiae also stout, a little longer than the femora; 

 the other legs are moderately stout, long, reaching beyond the tip of 

 the abdomen, with a few scattered rather short spinous hairs; the hind 

 tarsi three-jointed, the last joint smaller than the others and all to- 

 gether two-sevenths the length of the tibiae. Fore wings unusually 

 broad, broadest apically, where their breadth more than equals one- 

 fourth of their entire length, provided with two longitudinal veins, divid- 

 ing the disk into three nearly equal portions, connected in the middle 

 by a cross- vein, and with either border by other cross-veins at about one- 

 third and two-thirds the distance from the base to the tip of the wing ; 

 the wing is heavily fringed, especially along the hind border. Hind 

 wings veinless, nearly as long, and, at the tip, nearly as broad as the fore 

 wings. Abdomen nine-jointed, half as long again as the thorax, rather 

 tumid, scarcely or not at all produced apically. 



PALylEOTHRIPS FOSSILIS Scudd. {loc. cit.) 



Head small, tapering a little in front, where, however, it is broadly 

 rounded. The antennae are certainly seven-jointed, and none of the api- 

 cal joints show any indication of being connate, the last joint being of 

 the same length as the two jireceding it, tapering and bluntly pointed ; 

 none of the joints show any enlargement in the middle, but the middle 

 joints are slightly larger at the distal extremity than at the base ; they 

 appear to be destitute of hairs. The prothorax is subquadrate, a little 

 broader than long, with rounded sides ; the fore femora are unusually 

 stout, as long as the width of the prothorax. The longitudinal veins of 

 the fore wings approach each other somewhat abruptly in the middle,, 

 where they are united by a cross-vein ; and, at the tip of the wing, they 

 curve away from each other ; the two cross- veins on the lower third 

 of the wing are, respectively, slightly further from the base of the 

 wing than the corresponding veins of the upper third ; the fringe on 

 the posterior border is largest near the tip of the wing, where the hair» 

 are about three times as long as those on the costal border. The first 

 hind tarsal-joint is scarcely longer than broad, cylindrical ; the second 



