—So- 

 lower portion only has the papillae and hairy surface. The sacs and 

 tentacles here are whitish, instead of orange, as in acrcea. The 

 processes of the latter species have a most remarkable resemblance 

 to the tentacles of the larva otPapilio aslvrias, both in color and in shape. 

 In both species an intense odor, somewhat like the smell of laudanum, 

 is apparent when first the tentacles are exposed; and there is no reason- 

 able doubt but that they are odor-glands, though exactly what purpose 

 they serve is not so clear. In closely allied species no trace of this struct- 

 ure has been detected. Several fresh specimens of several species of 

 Arcfia, Spilosoma virgmica, and Hyphantria textor showed no trace of it: 

 and no dry specimens of any other species thus far examined have a 

 similar structure. 



Some years ago Mr. Morrison observed and described the structure- 

 in acraa and mentions having found similar structures in Agrotis plecta 

 and Euplexia lucipara. This I have not been able to verify. Prof. Riley 

 has described similar structures in Ahtia xylina, and probably a consider- 

 able number of other species will be found to have them. 



Notes on Geotrypes Opacus, Hald. 



By Alfred W. Jones, Salina, Kans. 



I do not know as to the relative rarity of this species, but from the 

 fact of always finding a ready exchange for it, I suppose it is not very 

 common. 



I have almost always taken it, where I have found no other scaveng rs 

 at work, except Aphodias, and a few Staphylinus perhaps, and I have al- 

 ways taken it either very early in spring or late in the fell. 



Generally I have taken it on low bottom land, or on sand bars in 

 the river, where cattle are wont to drink: here I have taken most 

 of the specimens, and I have taken them at the very water's edge where 

 they had burrowed down into sand that was saturated with water. But 

 I never found more than three or four in one place until last November, 

 when in company with Mr. Warren Knaus, I drove to Manhattan and back 

 from Salina. On our trip going down I saw a specimen crawling along 

 in the road, and stopping to get it, I observed some fresh manure which 

 yielded several specimens. Thinking we had procured all of them, we 

 drove on, but returning about a week later we stopped to examine the 

 very same place, and though at first it appeared as if it were a useless 

 search, Mr. Knaus said that he saw several burrows going down into the 

 sand and meant to find out what was there. He dug down nearly a foot 

 with no success before he threw out one, and then in a few minutes we 

 had eleven specimens in the Cyanide bottle. 



