98 THE FLORIDA BUGGIST 
experiment station building with the statement that he extracted it from 7 
his eye where it was very painful, causing a much more severe smarting 
than a egnat. 
Gainesville, Fla., August, 1918. 
Type in the author’s collection. 
The following key will enable one to separate the North American species 
(except J. semicaeus the description of which, in Uzel, is too brief) which 
are now (see Hood in Entomologist, Vol. XLVIII, No. 624, May, 1915, p. 106) 
placed in the genus Trichothrips. Moulton’s key (U.S. D. A. Bur. Ent. Tech. 
Ser. 21) has been followed for the species there given. 
KEY TO THE SPECIES OF TRICHOTHRIPS OF NORTH AMERICA 
I. Prominent spines on body with blunt or dilated tips; most forms very 
dark brown or nearly black (except T. angusticeps), usually nes short 
wings (except T. longitubus). 
a. Each fore tarsus armed with a tooth; antennae about 1.7 times 
as long as head; total body length about 1.5 mm. 
T. angusticeps Hood. 
aa. Fore tarsi not armed; antennae about twice as long as head. 
b. Wings fully developed; body length about 1.8 mm.; tibiae, 
tarsi, and intermediate segments of the antennae bright 
lemon yellow; tube fully as long as the head. 
T. longitubus Hood. 
bb. Wings short; body length about 1.2; whole antenna clear 
yellow; tube about half as long as the head. 
T. brevitubus n. sp. 
II. Prominent spines on body acute; antennae about twice as long as head. 
a. Individuals small, about 1 mm. in length, without ocelli or wings. 
b. Eyes reduced, lateral profile showing but three facets; first 
segment about half as long as the second....T. smithii Hood. 
bb. Eyes small but normal; first antennal segment nearly as 
lONS FAS SCCOMC eee eee eee eee: T. flavicauda Morgan. 
aa. Individuals rather large, 1.5 mm. or more, wings fully developed 
or brachypterous. 
b. Each fore tarsus armed with a tooth. 
ec. Antennae 1.75 times as long as head; tube .7 as long 
as head; total length about 2 mm., fore tarsi with a 
shorisestouts toothy T. ambitus Hinds. 
ec. Antenna slightly more than twice as long as the head; 
tube slightly shorter than head. 
d. Total body length about 1.7 mm.; fore tarsi with 
a small acute tooth; wings light gray brown, 
spotted with darker. ............ T. americanus Hood. 
dd. Tarsi with a large tooth. 
e. Last two antennal segments completely 
united; eyes very small; body length about 
PSM hee eee T. anomocerus Hood. 
