484 Mr. G. Lewis on the Mouth-organs of two Hhysodidfe. 



the maxillary palpi are very long, and the maxillge, labium, 

 and lingua exceedingly fragile and minute. The labium 

 appears to be extensile, like that of Steniis, and of the mo^t 

 complex character, and at rest it is so completely withdrawn 

 behind the mentum that dissection is rendered supremely 

 diflficult. Tlie lingua is very large and broad, and so thiu 

 as to be perfectly transparent. The mandibles are equally 

 abnormal, being enclosed in a horny envelope open on the 

 inside." 



To Mr. Matthews's drawings I have added one which 

 represents the curious tubercles on the last abdominal seg- 

 ment of the female of Climdium venejicum^ which will be 

 useful for comparison with the drawing of the corresponding 

 dissection of the male which is by the side of it. 



EXPLANATION OF THE FIGURES. 



Rhysodes niponensis. 



1. — a. P]pistonia. 



b. Labrum. 

 2.— a. Shield. 



b. Mandible. 

 3. — a. Mentum. 



b. Labium. 



c. Labial palpi. 



d. Lingua. 



e. Paraglossal processes. 

 4. — Maxilla. 



a. Inner lobe. 



b. Outer lobe. 



c. Palpus. 



Clinidium veneficum. 



6. — Apex of abdomen, J & 5 ■ 

 6. — a. Mentum. 



b. Labium. 



c. Labial palpi. 



d. Lingua. 



e. Paraglossal processes. 

 8.—/. Clypeus. 



e. Labrum. 



