Hood — Studies ill Tuhuliferous Tlti/sauoplera. 167 
clouded with brown, more darkly toward ))as('; lore wiiijfs witli about do 
iuterlocated hairs on posterior uiar(>;iu iieai’ apex, bef^s shorter and 
stouter than usual in the j>:euus; fore femora al)out l.S times as long as 
wide and slio:htly more tliau .8 as lou^ as liead, with two short, stout 
siiiues on inner surface lU'ar ))ase; fore tarsi aianed with a short and 
rather blunt tooth. 
Abdomen slightly wider than pterotliorax. 'Puhe slif^htly longer than 
head and about 3.4 times as lou" as sul)l)asal width, which is 2.3 times 
the apical; sides nearly strai^lit, very slightly expanded hasally, some¬ 
what constricted apically. Abdominal hristk's pointed, black at base, 
those on segment !) ecpial in length to tube. 
Measurements of holotype: Length 3.0() mm.; head, length .414 mm., 
width .324 mm. ; prothorax, length along median dorsal line .228 mm., 
width (inclusive of cox:e) .588 mm. ; pterotliorax, width .()3() mm.; ab¬ 
domen, width .084 mm.; tube, length .450 mm., width at base .135 mm., 
at apex .059 mm. Antennal segments: 1, 70/U.; 2, 93m; 3, length 205m, 
width 40m; 4, 149m; 5, 124m; <'>, 102m; 7, 84m; 8, 50m; total length of 
antenna .88 mm. 
Male (macropterons). — Very similar to female in structure, and ol 
about the same size though slenderer. 
Head about 1.58 times as long as greatest width; cheeks distinctly con¬ 
verging from eyes to basal fourth, thence snhparallel. 
Prothorax along median dorsal line about .7 as long as head and (in- 
cln.«ive of coxie) nearly twice as wide as long, sides broadly rounded. 
Fore femora enlarged and sw'ollen, 1.2 times as long as head and 1.8 
times as long as wide, armed on inner surface with two stout teeth and 
several bristles (see Plate 5, tig. 2); apex of fore femora yelloAv; fore 
tihite yellow along middle. 
.Abdomen more slender than that id’ female; tube slightly shorter than 
head. 
Described from one female and one male, taken in a moving train, 
(kinal Zone, Panama, by Mr. James Zetek. 
4’he antennal coloration will distinguish this species readily from its 
described congeners. The teeth on the inner surface of the fore femora 
of the male indicate a close relationship to D. armatns Pagnall, with 
which it has been compared by both Air. Bagnall and mj'.«elf. 
Polyphemothrips corticis sp. nov. 
( Plate 5, tig. 3.) 
Female. — Length about 4.1 mm.; width of pterotliorax .35 mm. Color 
blackish brown, with almost solid crimson hypodermal pigmeutatiou, the 
abdomen aiipearing bi'ight red to the naked eye; antennal segments 
and basal portion of tube, black ; .^(‘gment 3 of autemua pale yellowish in 
basal two-thirds. 
Head about 1.3 times as long as width at base, iiromiucutly ehwated 
along anterior portion of median line; vertex elevated and produced, 
overhanging bases of antenu.e; cheeks abruptly swollen on ventral lateral 
