324 ENTOMOLOGICAL NEWS. [ July, 16 
The specific name is suggested by the prevailing pale colors 
of the head and thorax giving the insect a brownish or sun- 
burned appearance. 
Males of this species were sent to Dr. Calvert and Dr. Ris. 
Dr. Calvert writes, “I do not know it.” Dr. Ris. says, “It is 
unknown to me and I cannot identify it with any of the de- 
scribed species; note its long feet and comparatively long 
spines.” In Calvert’s key to male Acanthagrion of the gracile 
group (Odonata Neotropical Region, Ann. Carnegie Mu- 
seum), adustum might run out to C, p. 161, or CC, p. 162; 
if the latter, it is separated at once from truncatum by the 
form of appendages, the basal black of abdominal segment 8 
of adustum, and many other characters, noting especially the 
yellow colors of adustum. If run out to C, p. 161, it would 
go in the key to HH, under which two varieties of gracile are 
distinguished ; adustwm is separated at once from these two by 
having the basal two-fifths to three-fourths of segment 8 
black (blue in others) and by the yellow coloration of head 
and thorax of ddustum. In de Selys’ arrangement (Le Grand 
Genre Agrion, 1876), adustum properly belongs in his pre- 
micre section, though, so far as the origin of A with reference 
to thé cubitoanal crossvein goes, some of the wings are as de- 
scribed in his seconde section, a section, however, recogniz- 
able by other characters ; adustum belongs to the gracile group, 
under de Selys’ premiére section, running out to temporale, 
from which species it is separated at once by the postocular 
spots not continuous with the rear pale color of the head (as 
in temporale) and by the extensive black on segment 8 in 
adustum (blue in temporale). 
In Calvert’s key to female Acanthagrion (loc. cit., p. 162), 
adustum might run out to B or BB; in either case it may be 
recognized by having abdominal segment 9 black, 10 largely 
blue, pale colors of head and thorax largely yellow or yellow- 
ish, not blue. 
This species flew with Enallagma- or Ischnura-like flight in 
the vegetation bordering the canal along its left bank just 
above the sawmill at Christianburg, a mile below Wismar. 
(To be continued) 
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