1863.] 
201 
body was 15^—23^ mill, and the seta 58—74 mill., or more than three 
times the length of the body. In 3 % limbata^ measured when dried, 
the body was 13^—19 mill., the expanse 28—-40 mill., and the seta 
35—52 mill.; the seta being considerably less than three times the 
length of the body. On the other hand, in Dr. Hagen’s abnormal % 
the seta is not much more than half as long again as the body. As in 
the % subimago of both these two species the anterior legs and the 
setae are short and the setse brownish immaculate, I should conceive 
that the abnormal % must have been a specimen which died immediately 
after moulting, before the anterior legs and setse had time to expand 
to their proper proportions, and the setse to acquire their proper color¬ 
ing. I noticed above, under Bde,tu sicca Walsh, an abnormal % with 
the anterior legs proportionally short. It may be added here, that both 
in hilineata and limhata in the anterior leg of the % imago the tibia is 
about i longer than the femur, varying a little in different individu¬ 
als ] while in 9 imago and in S 9 subimago the tibia of the anterior 
leg is but very slightly longer than the femur. Upon the above hy¬ 
pothesis, this fact serves to explain why in Dr. Hagen’s abnormal % 
the femur is 3 mill., and the tibia only 34 mill. In 17 9 hilineata, 
measured while alive, the length of the body was 17—^30 mill., the 
seta 30—^54 mill., and the anterior leg scarcely more than half as long 
as the body. 
JVote 18, p. 177. I conceive this doubtful 9 from Rock Island to be a 
mere variety of P. limhata Pictet (hilineata Hag. Synop.). As to the six 
differences pointed out above by Dr. Hagen, Is^. My three 9 of limhata 
measure, body 154—20 mill., expanse 38™43 mill., seta 26—30 mill, 
the specimen with the shortest body having the widest expanse. I 
have even a 9 of hilineata, selected from among a crowd of others, some 
but a trifle smaller^ the body of which when recent measured 30 
mill and when dry 23 mill, the expanse being 55 mill or 3 millimetres 
more than that of the doubtful 9 . Yet the usual dimensions of hilin¬ 
eata and limhata are about the same, except the setm. 2?ic/. The pro¬ 
thorax generally contracts longitudinally in drying and its shape is not 
a reliable character. Zrd. Of 5 S 3 9 limhata before me scarcely two 
have the abdomen exactly alike, the dorsum in some having the blood- 
brown color dominant, and in others the yellow dominant, with all the 
intermediate grades. Ath. In the four hind legs of the 5^39, some- 
