THE MYKIAl'ODA OF NORTH AMERICA. 205 



I. HORTENSIS. 



I. brunneus, lateribus niaeulis nigris ornatis ; antennis modice brevibus, pilosis, filif'ormibus, clavatis ; segmentis 

 42 ; scutis arete canaliculatis et infra ct supra ; mucrone nullo; squama preanali triangula, apice rotundato. 



Brown, ornamented with black spots on the sides; antennre rather short, pilose, filiform, clavate; segments 42; 

 scuta closely canaliculate both above and below; mucro absent; preanal scale triangular, with its apex rounded. 



I iiortensis, Wood, Proc. A. N. S., 1864, p. 14. 



The general color of this species is rather dark brown in the adult. When an indi- 

 vidual is examined with a magnifier, it is seen to be beautifully areolated with light 

 brown. In young specimens and adults, which have recently shed their exuvia?, the color 

 often verges on white, whilst the side spots are black, contrasting strongly with the general 

 tint. The head is rather broad inferiorly, and has its lower margin shallowly emarginate, 

 and distinctly, though minutely, denticulate. The triangular eyes are connected by a 

 broad, dark band. The first scutum is ornamented on its anterior portion by a dark, 

 transverse band. The lateral processes are almost wanting, even in the female. There 

 is on each side a series of large, black dots, one to a scutum, commencing rather abruptly 

 at about the fifth or sixth segment, and ending in the same way at about the thirty-ninth. 

 The subscuta on which they are situated are scarcely canaliculate. The anal scutum is 

 about equal in length to the two preceding it. Length, s to 1 inch. 



Hub. Philadelphia.— Dr. H. C. Wood, Jr. 



I. VIRGATUS. 



I. saturate brunneus; dorso luteolo, medio linea nigra instructo; antennis modice longis, pilosis, clavatis; seg- 

 mentis 35; scutis copiose distincte canaliculatis; mucrone subnullo; squamis analibus sparse pilosis; squama 

 preanali lata, subtriangula, apice rotundato. 



Deep brown; dorsum yellowish, furnished with a median black line; antennae moderately long, pilose, clavate; 

 segments 35; scuta copiously distinctly canaliculate; mucro almost wanting; anal scales sparsely pilose; preanal 

 scale broad, subtriangular, with rounded apex. 



I. viroatus, Wood, Proc. Acad. Nat. Sci., 1864, p. 14. 



The sides of the body are deep brown, almost black, whilst the dorsum approaches a 

 yellowish fawn color, and has a strongly pronounced, black median line. The lower 

 margin of the head is broadly emarginate, denticulate, and fringed with a series of hairs. 

 The anterior surface is mottled with light brown, and has a dark median band, termina- 

 ting in a transverse one low down. The under surface of the body is light-colored, and 

 is often somewhat areolated. There are some specimens whose pattern of coloration is 

 light brown or fawn colored, with two lateral and one median dark stripe. Are these 



