50 THE FLORIDA ENTOMOLOGIST 
ADDITIONS TO THE THYSANOPTERA OF FLORIDA—XII 
J. R. WATSON 
(Contribution from the Department of Entomology, Fla. Ag. Exp. Sta.) 
84. Eurythrips osborni Hinds. 
Beaten from Hupatorium serotinum in bloom, Oct. 1923. Near Gaines- 
ville. Previously reported from grass, Mass. (Hinds) and Tenn. (Morgan). 
85. Trichothrips marginalis Hood and Williams. 
Under rotting bark, with a good growth of fungi, of a fallen maple 
tree. Hog-town Creek near Gainesville. Sept. 1928. (T. H. Hubbell, 
Coll.) Described from Louisiana, where it was found under the bark 
of a willow tree. 
Under bark of the same maple tree the writer in Dec. 1923 took several 
specimens which correspond with the describtion of T. terminalis Hood 
and Williams, described from specimens taken from a stump at Orlando. 
It is the writer’s opinion that these two species are identical. 
86. Taeniothrips (Physothrips) xanthius Williams. 
Collected by Geo. B. Merrill from cynipid galls in pigeon plums sent 
in from Miami by Reginald Hart. 
Described and known only from Cattleya orchids from Trinidad, W. I. 
87. Gastrothrips (?) pallidus, n. sp. 
Color of body and legs a very pale yellow flecked with conspicuous 
hypodermal pigment which (like the eyes) is purple by transmitted, and 
bright red by reflected light; antennae light gray, bases of segments 3-6 
colorless, apical antennal segments and tube a darker gray. Head about as 
wide as long; cheeks decidedly bulging, abruptly rounded to the eyes and 
converging posteriorly, destitute of conspicuous bristles. Hyes rather small, 
diameter much less than the distance between them. Ocelli large, straw- 
colored, well separated from each other but posterior pair well separated 
from margins of eyes, opposite the anterior third of eyes; bordered with 
deep orange crescents. Mouth-cone long, reaching the mesosternum. Labium 
broadly rounded at the apex. Labrum sharp-pointed and scarcely at- 
taining tip of labium, tip dark. Antennae less than twice as long as head; 
segment 1 very broad, especially at the base, concolorous with the head; 
2, urn-shaped with a broad short pedicel, uniformly grayish; 3, subclavate, 
tapering uniformly to a narrow base, gray in apical third, almost colorless 
in basal two-thirds; 4, ovoid, darker gray in apical half or two thirds, 
colorless at the broad base; 5, more narrowly ovoid, basal third colorless; 
6, barrel-shaped with a broad colorless pedicel; 7, sub-cylindrical, ab- 
ruptly contracted to a broad base; 8, sub-conical, contracted at base; 7 
and 8 uniformly dark gray. Prothorax distinctly shorter than the head 
and (including coxae) nearly twice as broad as long; each angle and also 
coxa bears a short but rather heavy, knobbed bristle. Pterothorax about 
as broad as prothorax, sides sharply converging posteriorly. Fore coxae 
slender, but little wider than the others. Fore tarsi unarmed. Wings 
well-developed, membrane almost reaching the base of the tube, barely if 
at all contracted in the middle but the basal fourth markedly wider; very 
light gray except for a median darker streak along the vein which disap- 
pears near the base and a little above the middle; sparsely fringed with 
