NEW MALLOPHAGA. 469 



type of mouth-parts, and offer besides this no special 

 resemblances to the Mallophagous condition. There is 

 no indication in the mouth-parts of the Termitida?, 

 wingless and specialized though the Termites are, of 

 modifications in the direction of the Mallophagous mouth- 

 parts. In fact, considering the food habits of the Termites 

 and the specialization (by degradation) of their bodies, 

 the mouth-parts show a surprising faithfulness to the 

 simple usual Orthopterous type. 



It is in the comparison of the Mallophagous mouth- 

 parts with those of the Psocidse that such interesting re- 

 semblances and parallel or homologous structures appear 

 as to give basis for a belief in the near relationship of the 

 two groups. 



The comparison of the mouth-parts of the Mallophaga 

 and the Psocidse is not made here for the first time. In 

 1887 Dr. A. S. Packard read a paper before the Amer- 

 ican Philosophical Society entitled: " On the Systematic 

 Position of the Mallophaga," in which he makes such a 

 comparison. Dr. Packard based his paper on the studies 

 of Melnikow and Grosse on the Mallophaga, and of 

 Burgess on the Psocidse, and on his (Packard's) own 

 studies. In this paper attention is called to the general 

 similarities shown in the two groups in the position of the 

 mouth structures, due to the great development of the 

 clypeus, in the shape of the mandibles, in the reduction 

 of the maxillce, etc. 



In the light, however, of the preceding detailed ac- 

 counts of the mouth-parts of Ancistrona, Lcemobothrium, 

 Eurxmetofius and Goniodes (Mallophaga), with their de- 

 tailed descriptions of the oesophageal sclerites and glands, 

 and the "forks " of Ancistrona and Goniodes, the com- 

 parison of the Mallophagous and Psocid mouth struc- 

 tures may profitably be carried farther than has yet been 

 done. 



