228 
IOWA ACADEMY OF SCIENCES. 
NOTE ON A NEW SPECIES OP PHLCEOTHRIPS, WITH DESCRIPTION. 
HERBERT OSBORN. 
In connection with the paper by Miss Beach on the Thri- 
pidas it seems desirable to describe a species which has for a 
long time been in onr collections, but has not received a techni- 
cal description. 
Pbiceothrips rerhasci, n. sp. Black, polished; head quadrate with a 
prominent post-ocular bristle; prothorax widened behind; first joint of 
anterior tarsi armed on inner side with a curved tooth. 
Pern lie: Head quadrate, very slig-htly constricted behind, a prominent 
bristle behind the eye; antennae light yellowish with dusky base and tip, 
joints 1 and 2 black, 3-6 yellow, 7-8 dusky, ending with two bristles; pro- 
thorax widening behind, with prominent angles, three lateral bristles; 
meso and meta-thorax subquadrate. Legs black except anterior tibiae and 
all tarsi which are yellow, the tarsi somewhat clouded with dusky. 
Anterior tarsi with a short curved tooth on inner side of first joint at mid- 
dle. Wings hyaline except base of anterior pair, which is fuliginous; 
anterior pair with no fringe at base; anal vein entire; median vein distinct 
at base, but becoming obsolete; three long spines in a row on the inner 
side of the median vein near base; posterior wings at base with two long, 
slender bristles near together on hind margin; abdomen at apex with six 
long and seven short bristles; tube reticulate. 
Male smaller than female and having two slender spines on a slight 
elevation at side of the anterior margin of the first segment of the 
abdomen. 
Length of male 1.50-1.60 mm., female 1.80-1.90 mm. 
This species stands near to nigra, Osb. , but differs decidedly 
from that species in the more quadrate head, prominent poste- 
rior angles of the prothorax, as also in the presence of two 
prominent bristles just behind the eyes and the different num- 
ber and character of bristles at apex of tube. 
It occurs almost invariably in mullein, hibernating in the 
stools, and may be found in early spring at the base of the 
fresh leaves, especially among the dense interior leaves. The 
whitish, cylindrical eggs are deposited during April, and 
larvae develop on the mullein leaves. The larvae differ decid- 
edly from the larvae of nigra, in being yellow or orange instead 
of deep red. 
Adults, bred forms of which matured June 20th to 26th, are 
found in mullein blossoms in midsummer (July), and probably 
produce a second brood. Adults have been taken in Septem- 
ber in the seed pods, and in November at the base of dead 
mullein stalks. 
This is the species referred to in my article on ‘‘The Pood 
Habits of the Thripidae ” (Insect Life, VoL I, p. 141) as Phloeo- 
thrips sp., the species being cited in evidence of an herbivorous 
di t for the Thripidce. 
