THE RED-BANDED THRIPS. 23 
THE FULL-GROWN NYMPH OR PUPA. 
(PL V, fig. 4.) 
Length 1.017 mm. ; width at mesothoracic angles 0.2567 mm. ; shape similar to adult. 
Color translucent white to yellowish orange, first three segments and last segment of 
the abdomen bright red. Head 0.1208 mm. in length, 0.1963 mm. in width; white, 
with more or less orange (in older pupae surface distinctly reticulated); eyes oval, 
dark red, larger than in prepupal stage, facets large; three ocelli present in close tri- 
angle between the eyes in older pupae, white, surrounded by orange. Antennae laid 
backward on head and reaching to beyond anterior edge of mesothorax; segments 
indistinct, transparent white; segments 1 and 2 projecting more or less forward and 
upward; on segment 2 a long slender seta, 0.1208 mm. in length, projecting forward. 
Thorax (very plainly reticulated in older pupae) translucent white, with some 
yellowish orange on mid-dorsal region. Prothorax 0.1057 mm. in length, 0.2114 mm. 
in width, sides rounded. The entire body well supplied with setae, those on posterior 
angles of prothorax, on wing-cases, and on sides of the abdomen quite long. Wing- 
cases 0.4934 mm. in length, extending to beyond anterior margin of segment 6 of the 
abdomen, translucent white to faint yellow. Length from head to end of wing-pads 
0.755 mm. Legs translucent white, very plainly reticulated in older pupae. Abdo- 
men fusiform, surface reticulated in older pupae, general color translucent white to 
yellow with the first three segments and the last bright red ; in some examples a patch 
of bright green was observed, caused by food in the alimentary canal. Length of 
abdomen 0.5889 mm.; width 0.302 mm.; length of posterior setae 0.906 mm. 
HABITS OF THE ADULT. 
The adults are found feeding on both the surface and underside of 
the foliage. In many cases they are to be found mingling on the 
same leaf with Heliothrvps Jisemorrhoidalis Bouche. The adults also 
are found feeding in a colony with the pupse and larvae, all in close 
proximity to each other. They feed on the leaf content as do other 
thrips, and in many cases rest alongside the leaf vein or under the 
webs of the red spider. If disturbed or alarmed these insects were 
observed to make long quick jumps or to crawl rapidly over the leaf 
much faster than Heliothrips hsemorfhoidalis ever moves. There is 
another peculiar trait possessed by members of this species, namely, 
that the adults are often observed crawling on a leaf with the abdomen 
lifted and curved forward over the body. They are apparently very 
sensitive to cold, as adults that were placed on a cake of ice became 
motionless at once, but began to move actively again within a short 
time after removal. 
This species, like H. JisemorrJioidalis, selects the tender young foliage 
to feed upon, and while doing so the female deposits the eggs in the 
leaf. After the female has deposited each egg she seals the opening 
with a large drop of excrement which dries to a flat scale so that the 
egg-pocket is concealed. As these leaves begin to become exhausted 
from the excessive feeding of the adults and larvae that have hatched, 
the adults forsake them and attack the newer leaves of the plant. 
While this insect was under the observation of the writer, flight 
