146 Bulletin Wisconsin National History Society. [Vol. 9, No. 4. 



leaving only four apparent in the row. Average length, 

 .55 mm. ; average expanse, 1.0 mm. 



Female. — Slightly smaller, and not quite so dark as 

 male. 



( The following description of the colors was taken 

 during life : Honey-yellow, the abdomen pale and banded 

 transversely with dusky ; eyes and ocelli salmon-red ; legs 

 and antennae greenish olive ; apical two-fifths of tarsi 

 fuscous. S. H. S.) 



Of this species Mr. Scudder has sent me six slides, 

 four containing specimens reared from eggs of Aglais 

 milberti, and two from eggs of TJianaos lucilius. Mr. 

 James Fletcher has since sent me from Ottawa four speci- 

 mens reared during the summer of 1888, from eggs of 

 Oeneis macounn." [p. 1895.] 



The figure of the insect given with this description shows (pi. 

 89. fig. 8) a typical Pentarthron female but the ring-joint of the 

 antenna is not shown and the structural details are obviously in- 

 correct ; specifically also, the details of the wing ciliation are ob- 

 viously incorrect for while the description states that only five 

 cilia are present in the oblique line of discal cilia running back 

 from the stigmal vein the figure shows about eight; also in the 

 figure the discal ciliation of the posterior wings is represented by 

 but a single long line. The figure differs from the other figures 

 of this species (minutum, Riley 187 1 ; pretiosum, Riley, 1885 and 

 others) mainly on account of the fact that they are drawn on a 

 different scale and from a different aspect: thus in pretiosum the 

 marginal ciliation is figured as if moderately long, obviously in- 

 correct and the arrangement of the discal ciliation of both the 

 fore and hind wings in all three sets of figures is incorrect as is 

 also the venation; these minor differences in the figures therefore 

 are due to the drawings themselves and are not to be taken as 

 actual differences in the specimens from which the drawings 

 were made. They are quite without value for purposes of spec- 



