NEW MALLOP1IAGA. 453 



soldered to the glands, but in addition to this there is an 

 outer portion composed of a series of closely set, chit- 

 inous rings, surrounding the tube. Each gland is about 

 as wide as the sclerite, but is considerably longer. 



The Mouth-Parts of Goniodes cervinicornis. 



(Plate lxi, figs. 6-9.) 



In Goniodes cervinicornis as in Eurymetoj)us taiiriis the 

 mouth-parts are crowded far back on the ventral surface 

 of the head, so that the bases of the mandibles lie pos- 

 terior to the bases of the antenna?, instead of in front of 

 them, as in most of the Amblycera. 



The labium (plate lxi, fig. 7) has its anterior 

 border between the bases of the antennas, and hence it is 

 very much shortened from before, back. The part which 

 seems to have suffered most in the crowding is the men- 

 turn. It is narrow and not distinctly separated from the 

 ligula, and is farther aborted by having lost its palpi. 

 This condition is true not only in the genera Eurymetoftus 

 and Goniodes, but holds for the Ischnocera generally. 



The main sclerite of the labium is the submentum. This 

 is a large unchitinized sclerite, having a straight posterior 

 border and a very concave anterior border. The sides 

 present an obtusely angulated, convex margin. The an- 

 terior border is so deeply and roundly concave that it 

 forms almost a semicircle. Its most posterior part is as 

 far back as the middle of the lateral edge of the sclerite ; 

 hence there is a narrow portion projecting forward on each 

 side. These reach as far anteriorly as a line joining the 

 middle of the bases of the antennas. The rest of the 

 labium is situated in the concavity of the anterior part of 

 the submentum. It consists of the fused mentum and 

 ligula (plate lxi, fig. 7), and is divided into three lobes, two 

 lateral and one median. The median lobe is almost 



