NO. 2131. 



NEMATODE PARASITES? OF RODENTS— HALL. 



167 



flattened in the posterior half (fig. 214). A chitinous lamella ex- 

 tends along the entire spicule and the posterior half of the spicule 

 is scalloped along its median border to form a pectinate edge. The 

 chitinous lamellae of the posterior half of the 

 spicules are bent around to form a tubular struc- 

 ture. The paired accessory structures ate 50 to 

 52 ju long, slightly recurved at their distal ex- 

 tremity and ]3resenting three or four teeth on the 

 convexity of the cur^e. 



Female 25 to 35 mm. long and 170 y. thick. The 



Fig. 213.— Synthetocau- 

 lus eufescens. pos- 

 terior extremity of 

 MALE. X 100. After 

 Railliet, 1S93. 



'iG. 214. — Synthetocau- 



LU:3 RUFESCENS. SPIC- 

 ULES. Enlarged. After 

 Curtice, 1S90. 



Fig. 215. — Syntiieto- 

 caulu.s rufescens. 

 Posterior ex- 

 tremity OF FEMALE. 

 Enlarged. Aftee 

 Curtice, 1890. 



tail is subcorneal and ends in a blunt point (fig. 215). The anus is 80 

 )U from the tip of the tail. The vulva is just anterior of the anus and 

 is 100 [i from the tip of the tail. The vagina proceeds anteriorly from 

 the vulva and divides to form the convergent uteri. The eggs are 

 ellipsoidal, 75 to 120 \k long and 40 to 85 \h thick, with no trace of 

 segmentation when oviposited. 



Host. — OrycfoJagus cuniculus {Leptis eunlciilus) . (Commonly in 

 ungulates.) 



Location. — Bronchioles and pulmonaiy parenchyma. 



Locality. — Europe. 



As noted in comment on the foregoing species, I have followed 

 Neveu-Lemaire in accepting records of lung worm from Lepus cuni- 

 culus as Syn. rufescens. 



