324 ENTOMOLOGICAL NEWS. 



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 ; adustum 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 adustum. In de Selys' arrangement (Le Grand 

 Genre Agrion, 18/6), adustum properly belongs in his prc- 

 mic-re section, though, so far as the origin of A with reference 

 to the 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' premiere 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 IscJinura-\\ke flight in 

 the vegetation bordering the canal along its left bank just 

 above the sawmill at Christianburg, a mile below Wismar. 



(To be continued) 



