YIXSOXIA STKLL1FERA 47 



Genital armature (PL XLIV, fig. 8) with a short, 

 suddenly- pointed stylus, having a long ventral slit and 

 an opening at the extremity for the penis. Anal lobes 

 lai-o-e and very hairy. Dermis on certain parts of the 

 head finely reticulated (PI. XLIV, fig. 7). Eyes 

 (PL XLIV, fig. 6) placed considerably below the 

 antennas at the extreme anterior margin of the genas. 

 There is only one pair of dorsal ocelli, which are so 

 placed at the extreme margin in front that they are 

 partly seen from the ventral surface of the head (PL 

 XLIV, fig. 5) ; the single pair of ventral ocelli are 

 placed on the rounded posterior margin. 



Long, 1'25 mm. Expanse of wing, 2*25 mm. 



Puparium of male (PL XLIV, figs. 10, 11) formed 

 of the same glassy cereous matter as the test of the 

 female, and like it also in having one anterior and three 

 lateral rays or arms ; but there are two additional short 

 posterior rays, each furnished at the extremity with 

 three snow-white appendages, and the outline is much 

 more elongate. Central area hollow, very elongate, 

 flat beneath, and convex above, with a central snow- 

 white ovate boss. Anal cleft present, but often rather 

 faintly indicated. 



Long, 1*75-2 mm. 



Larva in life dusky yellow, with dark brown 

 eyes, and the margin of the body with downward and 

 inwardly-curved hairs. These latter would very pro- 

 bably appear quite straight in mounted specimens, but 

 I unfortunately did not prepare specimens for micro- 

 scopical study. In general appearance the larvaa are 

 inseparable from those of Lecanium, and it is doubtful 

 if they possess any distinctive character of generic 

 importance. 



Ova pinkish-yellow. 



Habitat. Prof. Westwood's specimens were from the 

 leaves of the orchid Cypripedium niveiim, from Siam, 

 and were briefly described (1. c.) in the report of the 

 meeting of the Entomological Society of London on 

 6th February, 1871, and subsequently described in the 



