235 



Life History. 



Eggs were discovered inserted in the midrib of a cane-leaf, 

 in a cane field at the Experiment Station. The position of the 

 eggs inside the leaf is shown in Fig. 3, Plate XVII. These 

 eggs failed to hatch; in fact, proved to be parasitized by a black 

 mymarid, Polyucma rcduvioli, one parasite to each G-gg. Mr. 

 Terry has found Rcduz'ioliis eggs badly parasitized in the plan- 

 tations of Kauai, also. 



A female in confinement deposited 15 eggs, singly, in an 

 irregular row in a cane-le'af. Two of these hatched in 10 and 

 II days respectively. The nymphs were slender, of a pale yel- 

 low color. They, molted 5 times at intervals of about 5 days 

 (3-7), and matured in 24 days. 



A darker colored species of Rcdin'iohis is common in cane 

 fields on Hawaii, and has similar habits to R. blackburiii. 



ANTHOCORIDAE. 



Triphlcps pcrscqucns. White.* (PI. XYI, tig. 7.) 



This little bug is very common in cane-fields, and also on 

 any plants infested with Aphis. In all stages, they feed espe- 

 cially upon Aphis, but they also eat some of the younger nymphs 

 of the leaf-hopper. 



Life History. 



The eggs are not known, but are probably deposited on the 

 surface of a leaf similarly to Physoplcurella mnndulns. From 

 some material under observation, (leaves infested with Aphis), 

 a nymph hatched July i8th. It was yellowish in color; very 

 active, running about; fed upon aphis; matured August ist. 

 Nymphal period 14 days. 



Physoplcurella mnndulns, White.** (PI. XVI, figs. 4-6.) 



This bug is a little larger than Triphlcps pcrscqucns. It is 

 of a light brown color. 



Generally distributed in sugar c'ane districts. Has habits sim- 

 ilar to Triphleps ; being larger, it undoubtedly preys to a greater 

 extent upon young leaf-hoppers, though primarily its food is 

 probably Aphids and Psocids. Both adults and nymphs were 



* "Hemiptera." Fauna Hawaiiensis, III, pt. II, p. 125, 1902. 

 ** " ^' •' " " p. 126, 1902. 



