68 INSECUTOR INSCITI/E MENSTRUUS 



evenly declivous in front, emarginate above at base ; cheeks finely rough- 

 ened, v^athout spiniferous tubercles. Eyes less than one-third as long as 

 head, haJf as wide as their interval. Ocelli placed far forward, the median 

 one between basal segments of antennae ; posterior ocelli most widely 

 sepcurated. Antennae 8-segmented, the last two segments not compactly 

 united. Mouth cone blunt, much shorter than its width at base. Pro- 

 thorax about as long as head, more than twice as wide at base as at 

 apex, lobed behind, with median dorsal thickening, lateral outline con- 

 cave. Legs of moderate length, stout ; fore femur nearly as long and 

 broad as head ; fore tibia with a stout tooth at tip in both sexes ; fore 

 tarsus armed with a long, stout tooth. Wings slender, narrowed at mid- 

 dle ; fringe sparse and weak, on fore wing not double along posterior 

 margin near apex. 



Type : Podolhrips semiflaous, sp. nov. 



The long prothorax and narrowed wings ally this genus very closely 

 to Haplothrips Amyot et Serville, from which it is separable in both sexes 

 by the armed fore tibia and tarsus, the enlarged fore femur, the form of 

 the head and prothorax, and the sparse, simple fringe of the fore wing. 

 The tibial tooth suggests Kladothrips, Oncothrips, Onychothrips, and 

 Plectrothrips} 



Podothrips semiflavus, sp. nov. (PI. I, figs. 3-5). 



Female. — Length about 1 .6 mm. Surface shining. Color golden 

 yellow, wath head, sides of metathorax, and last three abdominal segments 

 abruptly dark blackish brown ; abdominal segments 3-8 with a trans- 

 versely elongate dark spot above, near base ; legs yellow ; antennae yel- 

 low, usually with segment 1, sides of segment 2, apex of 5 and 6, and 

 all of 7 and 8 darkened with brown. 



Head 1 .2 times as long as wide, broadest slightly behind eyes, thence 

 narrowing roundly and abruptly to base, where there is a slight neck-like 

 constriction ; vertex rounded and evenly declivous ; dorsal surface without 

 sculpture ; cheeks finely roughened, sparsely and briefly spinose ; postoc- 

 ular bristles pointed, three-fifths as long as eyes. Eyes less than one-third 

 as long as head, separated by twice their width, not protruding, ventral 

 extent very slightly less than dorsal. Ocelli anterior in position, the pos- 

 terior pair one and two-thirds times as far from each other as from the 



' This name is spelled ' ' Plectothrips ' ' by Moulton on pages 1 2 and 3 1 of his 

 " Synopsis, Catalogue, and Bibliography of North American Thysanoptera," Tech. Ser. 

 21, Bur. Ent., U. S. Dept. Agr. The error should be noted and corrected. 



