DESCRIPTION. 
11 
tion to rest of the body. Color translucent white. Head large, quadrate ; eyes 
reddish ; ocelli absent. Antennae 0.195 mm. in length, apparently 7-segmented : 
basal segment cylindrical, short; second nearly twice as long as first, barrel- 
shaped; third and fourth spindle-shaped, ringed with a few fine hairs; fifth, 
sixth, and seventh slender, nearly equal in length. Legs translucent white. 
Abdomen tapering posteriorly ; first eight segments nearly equal in length, last 
two segments longer than others; each abdominal segment with longitudinal 
rows of setae, the tenth with 
four setae about 0.045 mm. in 
length. 
At this stage there seems to 
be nothing to distinguish this 
species from H. licemorrhoidalis 
THE SECOND-STAGE LARVA. 
(Fig. 5.) 
Length, 1.05 mm. ; width of 
mesothorax, 0.27 mm. Shape 
fusiform, about same as larva ; 
of mesothorax and meta thorax 
long, robust, cylindrical; sides 
of mesothorax and metathorax 
and first five abdominal seg- 
ments nearly parallel; pro- 
thorax narrowed toward head ; 
last five abdominal segments 
tapering to the last segment, 
which is cylindrical and trun- 
cated at end. Color of head 
and prothorax light yellow, 
mesothorax and metathorax 
and first six segments of abdo- 
men translucent white, stained 
on sides with crimson blotches 
and with yellow on dorsum to 
some extent ; next three seg- 
ments of abdomen the color of 
head, last segment of abdomen 
white; alimentary tract plainly 
indicated by the brownish color 
given it by inclosed food. Surface of body covered with minute granulations. 
Head quadrate, rounded in front and notched behind the eyes, 0.12 mm. long, 
0.0825 mm. wide; eyes small, reddish; ocelli absent. Antennae 7-segmented, first 
four segments the color of head, the others translucent white; first segment 
short, cylindrical ; second longer, barrel-shaped ; third and fourth spindle-shaped 
and annulated; fifth, sixth, and seventh slender and cylindrical. Legs long, 
yellowish. Abdomen 0.60 mm. in length, fusiform, ovipositor not formed; seg- 
ments with rows of fine setse increasing in length toward posterior end; ninth 
and tenth segments with longer seta?. 
Fig. 4.- 
-The bean thrips : First-stage larva, 
enlarged. (Original.) 
Greatly 
