1903.] H. W. Peal— Monograph of the Oriental Alevwdidse. 83 



similar but smaller setae on lateral margins. Surface of dorsum and 

 especially of the margin covered with a very great number of extremely 

 minute circular pores which tend to form detached groups. These pores 

 are also present over the radial patches, but the grouping does not differ 

 from the rest of the margin, the pores not being arranged in any sort of 

 pattern. 



The margin of the pupa-case turns quite white a short time before 

 the adult emerges. Vasiform orifice conical, apex pointing caudad. 

 Anterior margin flat. Lateral margins sloping inwards ; the sloping 

 surface with six ridges on each side. Operculum rhomboidal; the pos- 

 terior margin somewhat incurved. The opei*culum extends to about or a 

 little beyond the centre of the vasiform orifice. Surface setose, colour 

 light brown. Lingula two-jointed, lower joint short, stout. Upper joint 

 club-shaped. The lingula extends for one-third its length beyond oper- 

 culum; the surface setose, colour brown. Two long hairs spring from 

 near the tip of the lingula and extend some distance beyond the vasiform 

 orifice. 



Pupa extracted from puparium. 



Head fairly broad, colour yellow, the ocelli lighter in colour. Tho- 

 rax rather dark yellow, abdomen light yellow. Eyes dark maroon. Un- 

 folded wings dark grey. Legs almost transparent, well formed, setose. 

 Sides of abdomen flattened and spread out. Abdominal segments fairly 

 distinct but the vasiform orifice cannot be made out. Antennas not 

 noticeable in the specimen examined. When the adult emerges from 

 the pupa-case the dorsum splits up not only from the cephalic margin to 

 thorax, and across the thorax, but also right round the inner edge of 

 the margin so that in empty pupal cases the anterior portion of the 

 dorsum is usually missing. I have observed no parasites on this species. 



Adult female. Length 19 mm. Wing. Size 19 mm. x *85 mm. 



Body light yellow ; antennae and legs semi-transpai'ent white. Tip 

 of mentum grey. A lateral grey stripe on each side of the first segment 

 of the abdomen, and dorsally a rather broad diagonal grey patch on each 

 side of the same segment. Dorsally each abdominal segment dark grey 

 nearly the entire width of the body. An oval grey plate situated on the 

 dorsal surface of the last segment of the abdomen. It encloses the 

 vasiform oinfice. Ventrally the abdomen covered with fine short hairs. 

 Body and legs covered with white meal. Eyes reniform almost divided ; 

 colour dark maroon. Wings immaculate. Vasiform orifice broadly coni- 

 cal, the anterior edge somewhat produced and with a flat indenture in the 

 centre. Operculum cordate, apex pointing cephalad. Posterior margin 

 incurved ; lateral margins dark and wavy. The operculum extends nearly 

 the whole length of the orifice, but is somewhat narrower. Colour dark 



