480 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.50. 



Achorutes longispinus MacGillivray ('93, p. 315) is an Isotoma, as I 

 have found from an examination' of four of the cotypes which were 

 kindly sent to me by the author of the species. 



ACHORUTES TIGRINA Harvey. 

 Plate 8, figs. 7-9. 

 Achorutes tigrina Harvey, 1900. 



"The ground color straw yellow mottled with patthes of deep 

 broAvn; the sutures show the gi'ound color and give a transversely 

 banded appearance; the dark markings on the dorsum arranged 

 in three interrupted longitudinal bands, one median and the others 

 lateral, alternating with the ground color; these longitudinal stripes 

 show more plainly on the middle of the body, where each segment 

 bears about three blotches in each band," Eye-patches approxi- 

 mate; eyes eight on each side (fig. 7). Postantennal organ (see 

 beyond). Antennae as long as the head; segments as 3:8:6:9; 

 second and third subcyhndrical; fourth rounded conical. Body 

 slender, subcyhndrical; abdomen scarcely dilated. Ungues (fig. 8) 

 broad, slightly curving, with inner margin unidentate beyond the 

 middle. Unguiculus two-thirds as long as unguis on first and second 

 pairs, one-half as long on third pair; with small semi- elliptical 

 lamella preceded by a rounded basal lobe, and with setaceously 

 produced outer mai-gin; claws minutely tuberculate. One long 

 tenent hair, minutely knobbed. Furcula not quite extending to 

 the second abdominal segment; manubrium stout, trapezoidal; 

 dentes (fig. 9) obese, with apex one-third as broad as the base; 

 mucrones (fig. 9) one-third dentes in length, simple, rounded api- 

 cally. Anal spines absent. Body thickly clothed with long stiff 

 setae and long curving hairs. Length, 1.3 mm. 



The postantennal organs, as I found them, were simple circular 

 organs, as in figure 7. I examined them in but one specimen, how- 

 ever, having only three of Harvey's cotypes at my disposal, so I 

 can not say whether they were abnormal in this specimen or not. 



This species was described originally from eight cotypes, found on 

 bark in the woods at Poronal, Maine, in May, by O. O. Stover. 



ACHORUTES COPIOSUS, new species. 



Plate 8, figs. 10-14. 

 Achorutes schneideri Schaffer, Guthrie, 1903. 



Blackish blue. Eyes eight on each side. Antennae slightly longer 

 than the head; fourth segment about twice as long as the third. 

 Unguis (fig. 10) slender, unidentate about one-third from apex. 

 Unguiculus more than half as long as unguis, with rounded basal 

 lamella and with distal half acuminate. Claws minutely tuberculate. 



