l893'] ENTOMOLOGICAL NEWS, 183 



minal one; narrow prothorax and metathorax, the former bearing.a dense, 

 dark and two lighter spots; the dorsal band made up of three darker and 

 two lighter stripes; the fusiform body broad at the sixth segment, and the 

 obtuse rounded terminal segment of the body beating short, inconspicu- 

 ous anal booklets; size from 1.5 mm. — 2.5 mm. 



A sluggish species with weak elater, which it does not often 

 use, preferring to feign death and roll up like a wood louse. It 

 rarely jumps over two inches. 



Exceedingly abundant during the whole Winter of 1891 and 

 '92 in celery stored in the cellar. It was also noticed out of doors 

 in the Autumn in potato-hills. It probably lives out of doors, 

 and was carried to the cellar with celery and the dirt used to cover 

 it; exceedingly abundant. Many hundreds seen and many exam- 

 ined. Associated with Toniocerus plumbeus, Lepidocyrtus vietal- 

 licjis, Lipura ambulans, Isotoma tricolor, Templetonia aynericana 

 and an undetermined species of each Entomobrya and Isotoma. 



Relationship. — The presence of anal spine places this species 

 in Group B of Lubbock's Classification. We don't know how 

 carefully Lubbock's species were examined, but the spines of our 

 species might readily be overlooked, unless searched for with a 

 high power. Apparently more related to Acharutes marmorattis 

 Packard than any described American species, but readily dis- 

 tinguished from it by the short anal hooks, larger size, thicker 

 set body, color and structure of the terminal segment of the elater. 



The accompanying drawing of ^. brevispinus n. sp. (figs, i and 

 2) were made by Mr. Emerton from live specimens. They show 

 the head too oval and not broad enough behind the prothorax is 

 too long and does not show the spots on the neck usually seen. 



For purposes of comparison we add cuts of what we take to 

 be A. marmoratus Packard (figs. 3 and 4), and of A. nivicola 

 Fitch (figs. 5 and 6). The latter has not been figured so far as 

 we know, and as it is used by Packard as a standard for com- 

 parison in describing the American species of Acharutes, we re- 

 gard the figures important. The cuts of A. nivicola are drawn 

 to a larger scale than the others. A. brevispinus usually exceed- 

 ing A. nivicola in size. The species we take to be Packard's A. 

 marmoratus grows much larger than his description indicates, 

 being nearly 2 mm. in full-grown specimens. Found by us on 

 Agarics and Boleti. We are not sure but what A. boletivorous 

 Packard and A. marmoratus Packard are the same species. Our 

 specimens have the ovate third joint of the elater, which seems 

 to be the most important difference. 



