- 266 ENTOMOLOGICAL NEWS. [June, ’o08 
The T-shaped spot on frons is best developed in jalapensis, 
and of smallest area in multicolor. In multicolor the stem of 
the T in front is about .66 mm. wide and the sides of the stem 
are straight or slightly concave, diverging posteriorly and 
isolating the blue vesicle and the lateral ocelli from the blue 
area of the frons by a band of black about twice as wide as the 
ocelli. The ocelli are separated from the blue vesicle by a line 
of black narrower than the ocelli. In mutata the stem of the 
T in front is wider than in multicolor but scarcely I mm. wide, 
but the sides, instead of being concave, are distinctly convex, 
and the vesicle is less blue, the vesicle and the lateral ocelli 
more widely separated from the blue area of the frons, and the 
lateral ocelli separated from the vesicle by a line of black fully 
as wide as the ocelli. In jalapensis the stem of the T in front 
is over I mm. wide, the sides straight but more divergent than 
in the other two species, the lateral ocelli and vesicle isolated 
from the blue area of the frons by a band of black about three 
times as wide as the diameter of the ocelli; the extent of blue 
on the vesicle as in mutata. 
In coloration of abdomen males of mutata and multicolor 
are almost identical, although the blue spots are slightly re- 
duced in mutata especially on segment 10; jalapensis has the 
spots greatly reduced. A similar reduction is true also of the 
more obscurely colored females. In the matter of coloration of 
jalapensis and mutata we have an exactly parallel case in the 
two species with very similar appendages which have been as- 
sociated under the name constricta. In this case, as in the case 
of mutata and jalapensis, the species with the dark-colored 
abdomen is the slenderer, less robust of thorax. The habits 
of the two species associated under constricta are well known 
to me and are entirely distinct; it is probable that mutata and 
jalapensis show a parallel difference in habits. 
Some venational characters of the three species are tabulated 
below. These may be summarized briefly, calling attention to 
mutata and multicolor especially, since in these venational dif- 
ferences are most constant. 
1. Mutata compared with multicolor has narrower wings 
with distinctly less curved supplements and a more distal ter- 
