RESEARCHES IN HELMINTHOLOGY AND PARASITOLOGY. 47 



ing examined it and found it still presented no signs of life. Every 

 part of the insect was perfect, not even the antenna; being broken. 

 Upon feeling it, it was very hard and resistant, and on making an 

 incision through the thorax it exhaled a fungoid odor. The insect 

 had been invaded with a parasitic fungus, which everywhere filled 

 the animal, occupying the position of all the soft tissues, even into 

 the tarsal joints. It formed a yellowish or cream-colored compact 

 mass, and in the abdomen inclosed in its center the stomachal teeth 

 of the insect. 



Examined microscopically, the fungus matter was found to consist 

 of a mycelium of filaments for the most part simple, but occasionally 

 branched, and elliptical or globular sporular bodies, averaging 

 I -2333d inch in diameter. 



[May, 1851. No. 76. See Bibliography.] 



CONTRIBUTIONS TO HELMINTHOLOGY. 



A scar is, Linn. 



1. Ascaris Alienata.—^wd. Entoz. Syn., p. 661 : Dujardin Hist. 

 Nat. des Helminth, p. 158. 



Body nearly uniformly cylindrical, white ; mouth prominent, with 

 the three lips prominent and very distinct ; no membranous or other 

 appendages. 



Female.— Body cylindrical to within four lines of the mouth, 

 when it gradually becomes narrowed ; posteriorly straight, abruptly 

 narrowed into a very small obtii.se tail, i-5th of a line long from the 

 anus : whole length 4 inches 3 lines ; breadth i and i-5th lines. 



Male. — Cylindrical, attentuated toward the extremities ; posterior 

 extremity incurved without appendages ; tail short, curved ; length 

 2 inches ; breadth 3-4ths of a line. 



Habitation — A male and female found in the intestine of MepJiitis 

 americana. Received from Prof. S. F. Baird, Carlisle, Pennsylvania. 



Remark. — It corresponds in every particular except in size, being 

 twice as large, with the Ascaris alienata obtained from Nasua riifa, 

 described by Rudolphi. 



2. Ascaris Eiitomelas, n. s. — Body cylindroid, attentuated at each 

 extremity, curved, whitish, with the black intestine visible through 

 the translucent integument, without membranous appendages ; 

 generative aperture posterior to the middle ; tail conical, pointed, 

 i-i8th line long. 



Length of female i to i;-' lines ; breadth H of a line. 

 Ovmm 1.333d inch long ; i -500th inch broad. 



