Io6 RESEARCHES IN HELMINTHOLOGY AND PARASITOLOGY. 



Mcnnis era ssi can data, Leidy. Ibidem. 



Mennis ferruginea, Leidy. lb. Body long, capillary, narrowed 

 towards the extremities, most narrowed anteriorly. Head slightly 

 dilated or not at all, truncated, convex. Caudal extremity slightly 

 curved, conoidal, obtuse. Color milk white when the worm is para- 

 sitic or is buried in the earth ; cream or yellowish white, or light 

 ochreous yellow% or light reddish brown when it lives in water. In 

 alcohol becomes tran.slucent yellow, bright yellow, approaching to 

 orange or brown. 



Eleven individuals {Menuis clougata, Pr. A. N. S., v, 263), of a 

 dusky yellowish white, and from 6 to 18 inches long by i-6th to 

 I -3d of a line broad, were obtained by Dr. Charles H. Budd in the 

 early spring season in a ditch emptying into the Rancocas creek, 

 New Jersey. Six specimens, opaque white in color, from 8 to 15 

 inches in length, were obtained by Samuel Powell, Esq., in digging 

 in the earth mould of his garden at Newport, R. I One specimen, 

 of a cream color, 22 inches long and i-3d of a line broad, was ob- 

 tained by Dr. William Gibson from a rivulet in Philadelphia count}-. 

 I found four specimens of a browmish white, from 9 to 16 inches 

 long and from i-6tli to i-4th of a line broad, in pools of fresh water 

 among the rocks of the seashore of Point Judith, R. I. One speci- 

 men (^Mermis crassicaudata, Pr. A. N. S., v, 263), opaque white and 

 8 inches long, I found in a ditch below Philadelphia. A specimen 

 {Mermis ferriiginca, Pr. A. N. S., v, 275), from Brazil, contained 

 in the collection of the Academy, is brown in color and measures 

 i4''2 inches long. A cream-colored individual, 4 inches long and 

 I -5th of a line broad, was obtained from an apple by Major Le 

 Conte, wdio, with great probability, supposed it had issued from the 

 larva of a lepidopterous insect in the core of the fruit. Professor 

 Agassiz sent me a specimen, translucent yellowish white in color 

 and 9^ inches long and i-5th of a line wide, obtained from the 

 abdomen of Orcheliuni gracilc, Harris. Lastly, I have obtained 

 specimens very frequently from Locusta Carolina of the meadows 

 below Philadelphia, and occasionally from the earth and ditches in 

 the same localitv. From one to .six of the worms occupy the body 

 of a single insect, closely coiled among the viscera, from the head to 

 the end of the abdomen. The worms are opaque white and measure 

 from 3 to 15 inches in length and from i-6th to i-4th of a line in 

 breadth. When the grasshoppers infe.sted with these parasites are 

 bruised the worms creep out and penetrate into the earth, as I have 

 satisfied myself by careful observation. In alcohol the Mcnnis of 

 the grasshopper assumes in time a bright yellow hue. 



