146 PROCEEDINGS OF THE NATIONAL MUSEUM. 



heavily marked with brown; the markings on the thorax and bands at 

 bases of first, second, and third (sometimes of second and third only), 

 and seventh and eighth segments of the abdomen are extended until 

 they coalesce and form broad bands; the dorsal surface of the head is 

 brown; sometimes all of the caudal segments are brown; the legs are 

 white, with brown streaks on dorsal surface of femora, and frequently 

 on tibiie also; antenna? same as in preceding variety." Beach. 



.Food plants.— Cnaumhcv, grass, smartweed. 



llaUtat. —Iowa, Mas.sachusetts. 



PSEUDOTHRIPS, new genus. 



Head much broader than long. Ocelli present. Maxillary palpi 

 three s(>gmented. Antenna eight segmented (apparently nine seg- 

 mented, owing to an apparent division of the sixth segment). Pro- 

 thorax nmch longer than head and somewhat broadened posteriori v; 

 one stout spine at each hind angle. Wings with two longitudinal 

 veins which, with the costa, are thickl}" and regularly set with quite 

 prominent spines; fore fringe well developed. Abdominal segments 

 two to eight, inclusive, bear across the middle of each dorsal plate 

 four weak spines, of which the middle two are close together upon 

 anterior segments but diverge posteriorly. 



This genus is erected for the single species Inequalis. 



{il:evdoo, false; Opii/\) 



PSEUDOTHRIPS INEQUALIS (Beach). 

 Plate III, figs. 30-32. 

 Thrips InequaUs Beach, Proc. Iowa Acad. Sciences, 1895, III, (1896), pp. 223-224. 

 Female. — Length 0.88 mm.; width of mesothorax, 0.22 mm.; gen- 

 eral color yellow; thorax and abdomen tinged with orange. 



Head fully one and one-half times as broad as long, slightly con- 

 stricted at hind edge, and retracted into the prothorax somewhat; 

 cheeks full; anterior margin nearl 3^ straight. Eyes of medium size, 

 rounded, slightly protruding, slightly pilose; ocelli large, well sepa- 

 rated, with orange- red margins; ocellar bristles present, but not very 

 long or prominent. Mouth cone moderately sharp and somewhat 

 shaded with l)rown at tip; maxillary palpi three segmented. Antennt^? 

 over two and one-half times as long as head; eight segmented, though 

 therc^ appear to be nine segments; relative lengths of segments as 

 follows: 



1 2 ^ ^ 5 _6_ 7 8 

 4 T 8.5 8.5 8 8+2 2 3 



Segment six has a distinct annulation around it at four-fifths its 

 length, the outer part appearing nmch like a separate segment. Seg- 

 ments one and two quite stout and rounded; three irregularly, and 

 four regularly clavate; seven and eight cylindrical. Segment one 

 paler than two, concolorous with head; three to six pale yellow in 



