84 INSECUTOR INSCITI.B MENSTRUUS 



Taking Edwards's data in conjunction with the few forms 

 known to me, I would divide the Old World (Aedes) stock 

 as follows: 



Group I. — Side piece without a basal lobe; harpes not espe- 

 cially modified; unci small (Stegomyia). A skeleton arrange- 

 ment of the species might be as follows : 



1. Clasp filament simple 2 



Clasp filament expanded at tip with the spine subterminal, long 



and curved vittatus Bigot 



2. Basal membrane expanded into a false lobe 3 



Basal membrane not forming such a lobe, 



{fraseri Edwards), (thomsoni Edwards) 



3. The false lobe free to the base, 



pseudoscuteilaris Theobald, (variegata Doleschall) 

 False lobe attached to the side piece, 



albopicta Skuse, argentcus Poiret 



Group II. — Side piece without a basal lobe ; basal membrane 

 modified, bearing five papillae, which may pass up the lobe, 

 becoming subapical ; clasp filament various (Skusea) . 



Ido not know this group at all, and my interpretation of 

 Edwards's figures may not be correct. 



Group III. — Side piece without a basal lobe ; harpe strongly 

 produced, ligulate, widened at tip and resembling an harpago ; 

 unci large. 



I have only one species for this group. Edwards does not 

 define it, although he must have observed it if, as I suppose, 

 part of the species grouped under Finlaya belong here. A 

 reexamination of these species from the new point of view 

 would be instructive. 



Aedes samoana Grunberg. 



Finlaya samoana Grunberg, Ent. Rundschau, xxx, 130, 1913. 

 Genitalia. — Side piece three times as long as wide, conical, 

 without lobes ; clasp filament apical, simple and rather short, 

 with a long terminal spine, half as long as the filament ; an 

 area near base of side piece densely setose, followed by a row 

 of very large scales crowded together. Unci large and prom- 

 inent, conical, contracted centrally, the tips incurved. Harpes 

 modified, a long ligulate curved stem, expanded in fan-shape 



