PSYCHE. 



STUDIES FOR STUDENTS. 

 I. 



THE ANATOMY OF THE LAR\A OF THE GIANT (RANK FLY (I lol orilihl ruliiginosa). 

 BY VERNON L. KELLOGG, STANFORD UNIVERSITY, CALIF. 



Prefatory Notf,. 



It is the writer's intention to present 

 under tlie title " Studies for Students " 

 a series of short papers wliicli shall offer 

 to students an introduction to work in 

 certain of those phases of insect study 

 which are likely to be neglected by 

 amateur entomologists, especially those 

 who have not been members of collegi- 

 ate classes in zoology or entomology. 



There will be presented in each 

 paper a small piece of work in the 

 study of insect structure, development 

 or physiology, in such a manner as to 

 serve as a practical exercise or lesson 

 which can either be directly repeated by 

 the entomological student without other 

 professional instruction, or can be used 

 as an example and reference for the 

 performance of similar work with some 

 other species of insect. In the case of 

 each of these papers (which will appear 

 irregularly) the actual facts recorded 

 will be new, i.e., the result of observations 

 not heretofore recorded. Thus these 

 papers may have a value to entomolo- 

 gists who are not specially interested in 

 a "guide for self-instruction." The 

 strictly technical directions to students 

 will be enclosed in brackets. 



It has long seemed to the writer that 

 the almost exclusive attention of most 

 amateur entomologists (and amateurs 

 constitute the great majority of the 

 total number of entomologists) to sys- 

 tematic work, the finding, preserving, 

 identifying and describing of species, 

 is a fact to be deplored. There is so 

 much that is interesting and profitable 

 to be studied in the structure, develop- 

 ment and ecology of insects, that it is a 

 pity that the systematic phase of insect 

 study should monopolize such a large 

 proportion of the work of the whole body 

 of entomologists. It is with the thought 

 that a few examples of the other phases 

 of entomological work put into a sort of 

 teaching manner may perhaps help some 

 amateurs to make a beginning in other 

 lines than the purely systematic one 

 that these "Studies for Students" are 

 written. 



Anatomy of the Larva of Holorusia 

 rubiginosa. 



The larvae of the Giant Crane-fly,* 



•The immiiture sL-^ges of Holorusia rubightosa have not 

 hitherto been referred to in print. The Ufe-history of tliis 

 largest known Dipteron with .1 description of the inimntiire 

 stages will be made the subject of a brief paper in some 

 future number of Psyche. 



