134 



MR. B. F. CUMMINGS ON THE 



lateral pieces became detached while the preparation was being 

 made, as they are very delicately connected. Snodgrass in his 

 account of A. gigas, a closely allied species, does not mention 

 any lateral pieces, figures the hypopharynx as a bifurcated rod 

 and calls it the epipharynx. But the presence of " maxillary 

 forks" is recorded in A. gigas, and these I have been unable to 

 find in A . procellarice. If they are absent, it might very well be 

 that Snodgrass has mistaken the detached lateral pieces for 

 maxillary forks. They are alike in shape. The maxillae are 

 attached to the lateral pieces (text- fig. 26, E). 



Text-fig. 26, 



Hypopharj'nx of Ancistrona procellarice, X 202. 



A, oesophageal sclerite; B, ramus; C, anterior hypopharyngeal plate; 

 D, lateral piece ; E, 1st maxilla. 



Dochophorus sphenophorus N. (from Platalea leucorodia). — This 

 species presents an interesting transition between the glands and 

 sclerite typical of the Ischnocera and the conditions found in the 



