HEMll'TEUA— llETEKOPTERA— PIIYSAPODES. 37:3 



Pal.eothrips Scudder (;raAa/('?, Gpi'i/'). 



f'ahrolliriiis iScmlil., Bull. U. S. Geol. Gcof;r. Siirv. Terr., I, 2>-2 (1875). 



This genus is allied to JSolotlirips llalida}-. The head is small, glo- 

 bose ; eyes rounded, much smaller than in Lithadothrips ; antennfe slender, 

 fully as long as the thorax, not more than seven-jointed, the joints cylin- 

 drical, subequal. Prothorax considerably larger than the head, tlie tliorax 

 as a whole very large, stout, and tumid ; fore femora ver}- stout, scarcely 

 more than twice as long as broad ; fore tibire also stout, a little longer tiian 

 the femora; the other legs are moderately stout, long, reaching beyond tiie 

 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 together 

 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, dividing the disk into three 

 nearly equal portions, connected in the middle by a cross-vein, and with 

 either border b}' other cross-veins at about one-third and two-thirds the dis- 

 tance 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. 



Pal^othrips fossilis. 

 PI. 5, Figs. 104, 105, 115. 



Palwothrips fossilis Scudd., Proc. Bost. Soc. Nat. Hist., XI, 117— name only (18(i7) ; Hull. U. S. Geol 

 Geo|rr. Siirv. T<!rr., l,2-i2-22^ (1875) ; in Zittel, Haudb. d. PaUeoiit., I, ii, 7S4, V\g. \)'J9 (IH8.-)). 



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

 rounded. The antennse are certainly seven-jointed, and none of the apical 

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

 length as the two preceding 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 a])i)roach each 

 other somewhat abruptly in the middle, where the}- are united by a cross- 



