58 B. GRASSI AND A. SANDIAS. 



variability is due to regeneration, it cannot be explained by 

 any process so simple as that of proliferation by division of 

 the third or fourth joints, but that when the shaft of the 

 antenna is regenerated, its division into a basal dark and an 

 apical light part must be antecedent to the meristic division. — 

 W. F. H. B.] 



The buccal organs are of the Orthopterous type. The 

 epistoma is short and broad, and is connected with the 

 labrum by a membranous rhinarium. The labrum is 

 broader than long, rounded in front and furnished beneath 

 with two rows of strong spines ; it possesses a median 

 suture. 



The mandibles are three-toothed, the two posterior teeth 

 being more or less distinctly denticulate. In the male 

 imago they are slender, elongate, and curved. But in 

 the female, and the larva of both sexes, they are 

 robust, short, and not curved; and the teeth are 

 generally stronger. 



The inner lobe of the maxillae (PI. 19, fig. 8) is somewhat 

 thin, bidentate at the apex, and furnished on its inner portion 

 with numerous species like those of the labrum. The outer 

 lobe (galea) consists of a single joint, which carries, as far as 

 I can see, a fringe of uniseriate hairs along its margin, and is 

 supported by a well-developed base. The maxillary palpi are 

 five-jointed, and somewhat exceed the maxillse in length; the 

 first joint is a little the widest, and the last is subconical ; the 

 first, fourth, and fifth are nearly equal in length, and a little 

 longer than the second and third, which are subequal. The 

 palpiger is scarcely distinguishable. The stipites of the 

 labium (PI. 19, fig. 7) are fused together in the middle line, 

 which merely presents a hairless sulcus. There are two pairs 

 of lobes, the inner being very much the smaller. Both pairs 

 are separated from the stipes by an evident suture. The 

 labial palpi are three-jointed, the apical joint being much the 

 longest, and reach, when directed forwards, to the anterior 

 extremity of the outer lobes; they are carried by a well- 

 developed base which simulates a fourth joint. The ligula 



