FROM THE society's GARDENS. 



667 



behind the posterior acute angle of each signatural plate, a spine 

 on the corneal surface of each eye, and a spiny hair behind and 

 the same minute spines dotted sparsely over the postantennal 

 dorsal area *. The chsetotaxy of the abdomen calls for no special 

 mention. 



Text-figure 18. 



p.Oes 



2nd 



St.N 



Ibidoecus flavus. Central nervous system. 



Infra.Oes. infra-OBSopliageal ganglion. Sup.Oes. supra-cesopliageal ganglion. 

 1st, 27id, 3rd. thoracic ganglia. St.N. stomatogastric nerves. 



Alivientary Canal. — Mr. Waterston has pointed out to me 

 some minute teeth on the chitinous lining of the pharynx in a 

 Lmmohothrion. Similar pharyngeal teeth in Lipeums ferox were 

 figured without comment in 1913 (9, p. 131, text-fig. 24). I now 

 find similar teeth in the pharynx of other genera, including the 

 present species, in which they are very minute and occur in small 

 rows, each tooth directed backwards. The patch of teeth in the 

 anterior caecum of the crop is present in its usual extent ; and the 



* It is likely that the chgetotnxy, at least of the head, just as in Anatceciis, will 

 prove to conform to the same plan throughout tlie whole genus. It is the same in 

 two other species (unnamed) which I have examined, making four in all 



46* 



