; a 
THE RED SPIDER ON COTTON, 4] 
SUMMARIES. 
fagerare daling consumption) pen Nymphs as... 2 eke ee eG er al enon css 33. 16 
Pancracerdallyaconsiimp Clon per AdUIt epee oc oc. ese ek eee reese oe ee BU ee wR VLE ahah 28. 88 
Mveraze daily consumption per bug for/all/individuals..-..... 2.2.20. 200 aed t ieee eee 32. 56 
iearonrousecondemympnaldinstannssrae cnc s(-)5 S285 cls siscch ee selec nlclcle scien cine nna ae aereclsie lobals galas 3. 22 
SD mp erONEO tat kb aT NAM IA LAN SbAIys see sits fal = 2 +) \n aia eixie\e a.clp n nlale eieinie nui eines cuca Scheele eee eee o 2. 66 
ae MOMEOMOUnUM TNT INSCALS Wee c ce sale acca te etl so ih Oe culls sca cueemeaccsscle¢ SA AE ey a at ah 4.3 
TaBLE 1X.—Consumption of red spiders by each instar of Triphleps insidiosus, 
Batesburg, S.C. 
Consump- | Consump- | Consump- 
ae tion for tion for tion for 
: 2d instar. | 3d instar. | 4th instar. 
Mites. Mites. Mites. 
10) Hey ea Sp a a 120 
DA alee a Vi LR Rd soe A Soe 129 
Dike rere ae ues pA oay Aes 153 
ANIM aaa Srl t y taleyi an al SRS GW 136 
days a Sie ar ates oe 113 135 
6 65 98 213 
7 96 125 136 
Average... 80. 5 112 146 
The occurrence of T. insidiosus on mite-infested leaves is recorded 
from Emporia, Va.; Raleigh, Charlotte, Greensboro, Wilmington, 
and Buies, N. C.; Leesville, Spartanburg, Clemson College, Bates- 
burg, and other points in South Carolina; Macon and Savannah, Ga.; 
Tallahassee, Fla.; Girard, Ala.; and, Meridian, Miss. 
LYGAEIDAE. 
Geocoris punctipes Say.—This hemipteron has not previously been 
considered in literature as a mite predator. Heidemann states that 
little is known about its life history. Observations at Batesburg 
are confined to the season of 1914, G. punctipes having been detected 
during August of that year. Eggs, seen in the midst of red-spider 
colonies on cotton leaves, were collected for rearing, and immedi- 
ately upon hatching certain of the nymphs were placed in isolated 
cells with red spiders and their eggs. It was found that the newly 
hatched nymphs readily devoured the red spiders as well as some of 
the eggs. The egg of G. punctipesis cylindrical and elliptical in shape, 
fluted, of a pale amber color, and is deposited in the center of the mite 
colonies. Table X presents the data we have secured on the life 
history. 
