the Life History of TricJioptilus paludttm. 158 



wings and appendages which may be pale and transparent, 

 or a deep soHd-looking green. A certain oKve-brown tint 

 appears as the pupa matures for emergence, the eyes, 

 wings, etc., becoming black. 



One other point in the variability of the pupa has regard 

 to the forward hairs (I) of the abdominal dorsum. The 

 most usual form is perhaps that described with this hair 

 on the first five segments, and wanting in the others ; it 

 does not often show any length on 5th segment, and is 

 more frequently wanting on 4th, 3rd, or even 2nd, and 

 presumably may be entirely absent. When absent it is, 

 however, usually represented by more or less of a stump or 

 abbreviated hair, and its site when absent is marked by a 

 basal circle or point. It is unusual, however, as happened 

 in the specimen described for the hairs present to be well 

 developed and the rest to be absent, i.e. merely a basal 

 trace present. It is more usual for there to be one or two 

 intermediate abbreviated hairs, as, for example, 1st and 2nd 

 good hairs, 3rd shortened hair, 4th very short, 5th stump, 

 (jth wanting or some such formula. 



