215 



A NEW SCALE-INSECT AFFECTING SUGAR-CANE 



IN NEW GUINEA. 



By the latk Dr. A. Rutherford: with a Note by Edmund 



Jarvis, Entomologist. 



(Communicated I >j/ W. \V. Froyyatt, F.L.S.) 



AULACASPIS MAJOR, U.Sp. 



Female scale thin, greyish-white, soniewliat uniform, large 

 (longer diameter ."j-.'i'^.^ mm). Exii\'i:v pale yellow, the first pro- 

 jecting, the second snbmarginal. 



Adult female broadest in tlie cephalo-thoraci<; region. CephaUc 

 end broadly rounded, sometimes with a slight median notch. 

 Pygidiuin hyaline wdth several strands of chitin running cephalad 

 from the apical margin. 



Antenna : a small tubercle of ii-regular shape, and beai'ing a 

 stovit, curved seta. 



All stigmata with parastigmatic pores in a compact group. 

 Three pairs of prominent, hyaline lobes. Median lobes not sunk, 

 slightly expanded distally, apex broadly rounded, about one- 

 quarter of their own wddth apart. A prominent chitinous area 

 of the pygidiinn between the lobes. 



Second lobes duplex, the mesal half expanded distally, broadly 

 rounded at apex; lateral half with the mesal side straight, the 

 lateral side oblique. 



Third lobes of mucli the same shape, and quite as broad as the 

 second. Laterad of the third group of plates are several broad, 

 serrated projections associated w4th marginal gland-pores. 



Plates: none between median lubes; thei'eafter in the usual 

 positions 1, 1-2, 1-2, 2, 6-10. The penultimate segment bears 

 7-11, and the antepenultimate 5-8 similar plates. All plates stout, 

 tapering, a few slightly pectinate at apex. 



