52 



Hepialus sipec. cf. lupulinus L. Plate II, fig. 4, 



Material. Through the kindness of Mr. Claassen, Instructor of 

 the Government Horticultural School at Boskoop, Prof. Dr. J. 

 F. VAN Bemmelen procured material from the nurseries there. 

 Some years they are so abundant, that they damage the roots of 

 the lilacs, but in 1915 they were so scarce, that only a few 

 specimens could be obtained. The smallest measured was 2 cm., 

 the biggest 3 cm. (preserved in alcohol). Judging by the size of 

 the head they seem to belong to the same instar. The head is flat, 

 large, covered with setae. The ocelli are arranged in two vertical 

 rows of three each, between which there is one seta. The upper-jaws 

 are large. The setae of the body are placed on tubercula which are 

 not coloured. The setae are 1000 — 2500 /*. long and not plumed. 



Prothorax. This segment is almost completely hidden by the 

 head. No prothoracic shield. Over the stigma there is only one 

 seta, probably s. mhdorsalis. Further there occur s. infrastigmalis, 

 s. poststigmalis, s. basalis and on the leg many s. pedales. 



Mesothorax. S. dorsalis, s. dorsolateralis, s. suhdorsalis superior., 

 s. poststigmalis, s. infrastigtnalis, s. basalis, many s. pedales. 



Metathorax. S. dorsalis and s. dorsolateralis between which there 

 are still three other setae, which in all specimens occur on the 

 metathorax, but not on the mesothorax; s. suprastigmalis, 

 s. suhdorsalis sup., s. poststigmalis, s. propedalis, s. basalis and 

 many smaller s. pedales. 



Abdomen 1. S. dorsalis, s. dorsolateralis, s. suprastigmalis, of 

 which the two last ones are close together and s. dorsolateralis 

 is a little more oral, s. suhdorsalis sup. and inf., s. poststigmalis, 

 two s. infrastigmales of which the foremost might be compared with 

 s. prostig mails ; s. basalis, s. propedalis, s. pedalis or s. ventralis. 

 Segm. 2 = 1, but lacks s. suhdorsalis inf. 



^ 3 = 2, but has mostly five s. 'basales. 



„ 4, 5, 6 ^ 3 but only three s. basales. 



« 7 = 2. 



„ 8, stigma extraordinarily large, three s. basales, which are 

 placed higher than usual. 



