150 Annals Entomological Society of America [Vol. IV, 



probable, this will form the only rearing record yet known of 

 any immediate relative of this group. Here seems to be a hint 

 explanatory of the remarkable specialization of the first-stage 

 maggot in Phasiopteryx, for it is probable that Oestrophasia has 

 a similar maggot. The larvae of Crambus work underground, in 

 silk-lined galleries, feeding on the stems of growing plants, 

 especially corn. The Phasiopteryx type of maggot would be 

 quite well adapted to search out such hosts. Its smooth seg- 

 mental plates would enable it to penetrate the silken walls of 

 the galleries, where an ordinary maggot would become enmeshed. 

 Yet one cannot help thinking that the Phasiopteryx maggot is 

 rather needlessly specialized for such prosaic purpose. Per- 

 haps Oestrophasia has a still different type of maggi it . 



Characterizations to fit the new generic and specific names 

 used in this article will be shortly published, probably in the 

 more exhaustive paper from which the whole of the present 

 data are taken in advance. I must explain that I consider it 

 quite obligatory upon me, in all cases of doubt as to the deter- 

 mination, to give new names generic and specific to the forms 

 dissected, described and figured. These names will fix the 

 forms so as to prevent any further doubt arising as to their 

 identity. If this plan increase the synonymy, as it doubtless 

 will to an extent, there is no positive harm done; while the posi- 

 tive good is secured of certainty in determination. 



In the forthcoming more complete paper will also be given 

 fuller explanations of the functions of the various parts of the 

 female reproductive system ; the necessity for the use of the terms 

 preuterus, uterovagina, etc., which may be thought by some to 

 be superfluous, with numerous plates illustrating all the repro- 

 ductive types that have been drawn. 



I wish to announce that, after an extended comparative 

 study of many maggot types, I find the first-stage cephalo- 

 pharyngeal skeleton to consist of seven original main sclerites, 

 all paired, as follows: 



1. Pharyngeal — "lateral pharyngeal" of Hewitt in whole or part; "upper 



pharyngeal" of Nielsen plus "lower pharyngeal" 

 of same author in whole or part. 



2. INFKAPHARYNCEAL — lower wing of "lateral pharyngeal" of Hewitt in 



part; "lower pharyngeal" of Nielson in part. 



3. Dorsopharyngeal — "dorsal pharyngeal" of Hewitt. 



4. Hypostomal — after Hewitt. 



5. Infrahypostomal — "the plate below the skeleton "of Nielsen. 



6. Mandibular — after Hewitt. 



7. Dentate — after Hewitt. 



