496 CALIFORNIA ACADEMY OF SCIENCES. 



certainty because I have not seen the specimen, and 

 because in his correspondence Dr. Ila^en thinks that his 

 species cannot be maintained. After that I had at tirst 

 named it I. furctila." 



The evidence here presented to prove defixa Selys not 

 distinct from pcrparva aims to show that the differences 

 above tabulatetl are not constant. Two males from Cah- 

 fornia ab. 19-20, h. w. 12. 5-13, agree with 2, 3, 4 and 

 5 of dcfi.xa, have only the merest trace of an internal 

 basal tooth to the superior appendages, have the right 

 inferior appendage bitid. the lett trilid. Two other males 

 from California and one male from Olympia, Washing- 

 ton, ab. 20-22, h. w. 1 2.5-13.5, agree with 2. 3, 4 and 

 5 of iicpxa. have both inferior appendages bitid, black 

 stripes of right and left sides of 8 connected by a trans- 

 verse basal ring; in the Washington male the upper outer 

 point of the left inferior appendage is itself bitid. One 

 male from southern Texas, ab. 19.5, h. w. 12.5, agrees 

 with dcfi.xd, the black lateral stripes on 9 reach the apex. 

 One male from Denver, Colorado, ab. 20.5, h. w. 12.5, 

 agrees with 2, 5 and 6 of pcrparva, 3 and 4 of dcfi.xa, 

 both inferior appendages bifid. Another male from 

 Colorado, ab. 18, h. w. 12, agrees with 2, 3, 4 and 5 of 

 defixa, 6 of pcrparva, both inferior appendages tritid, 

 upper outer point of left appendage itself slightly bihd. 



2. That dcjixitni Hagen is different from pcrparva 

 and dcfixa Selys is apparently indicated by the following 

 expressions in Hagen's original description of dcpxiini 

 (Syn. Neur. N. A. p. 80); 8 and 9 are said to be '• blue, 

 at base a little black," instead of using such an expres- 

 sion as ••8-9 blue, with a black stripe each side " (/. c. 

 p. 76) as for Raniburii Hag. {^^veriicalis S^ij), pcrparva 

 and consequently depxa being similar to vcrticalis in this 

 respect. The superior appendages of dcfixnDi are said 



