17 



Life History 



A clustci- of 3 eggB wore found on the groove oi the middle of 

 upper surface of a sedge leaf. They are similar to the eggs of O. 

 accepta. They hatched the next day. The tiny eaterpillars were 

 whitish, Avith V)lack heads. T>ength l.o mm. One was bred thru 

 to maturity, fed upon Cyperns rohmdiis. The first molt occurred 

 on the tliird day. It was then light green, and the head was no 

 longer black. When about o mm. long, it was pale green; head 

 with 2 l)lack spots in front, ])lack ocelli, and a dot at each postero- 

 ventnd angle; cervical shield with bL%ck spot in each lateral lo1)e; 

 tubercle ii of segment 8, l)lack. 



When 10 days old it was 11 mm. long. The head now has the 

 two round black spots in fi-oiit, black eye-spots, and a black dot 

 at each postero-ventral angle. Cervical shield, and segnx-nts 2 

 and 12 have the markings of full-grown caterpillar. 



After a moult a))out the 12th day, it was 13 mm. long. \\\ 

 addition to above markings there are also present on the head, 

 two large black spots on each side above the eye-spot, and two 

 faint short oblique bars in front near middle and near the top of 

 the head. This is very near to the markings of full-grown cater- 

 pillar. 



Not all of the molts were observed, but when 20 days old the 

 caterpillar was aljont 2o mm., full-grown, and had begun to spin 

 a cocoon. 



Full-grown caterpillar. — (Plate 111, fig. G). Bright green, 

 darker along dorsal vessel; head testaceous, with the usual rounded 

 black spot in each lobe in front, ocelli black, above the ocelli on 

 each side of liead three large irregular spots, two o)iliqu(; bars 

 near middle of top of head in front, the black dot at postero- 

 ventral angle of younger stages is not present. Cfervical shield 

 without black margin, a l)lack bar followed by a dot in each 

 lateral lobe, two tiny black dots near middle in front. Tul)ercle 

 ii of segment 3 faintly black-margined below, and very strongly in 

 front, In-oadly conical, higher than the otlier tul)ercles. Tuber- 

 cles i, ii and iii of segment 12 faintly black-margined. Among 

 other caterpillars bred, sometimes the tul)ercle in front of spiracle 

 of segement 2, tubercle i of segment 3, and tubercle ii of segment 

 4, are faintly l)lackened on some part of margin. The incisures 



