132 GEO. B. HULST. 



the whole space ; thirdly, by the discal spots always being well 

 separated.'' 



There is no doubt that, if the larval history were not known, these 

 two insects would be regarded as one sj^ecies only, and not enough 

 separated to be worthy a varietal name. But in view of the larval 

 history there can be no doubt of their distinctness. I have found 

 instances where the normal structure of the larval case was modified 

 to suit circumstances, but never anything which approached so wide 

 a departure of type as in these two insects, and then only as a tem- 

 porary expedient. 



Prof. Riley says of this insect: "the case of this insect is invaria- 

 bly straight, and the excrementitious grains which cover it on the 

 outside are very closely and neatly woven together. It is attached 

 by the small posterior end to the main leaf stalk, and the worm 

 draws down and fastens two of the leaflets to hide it, and then feeds 

 upon them from the point to the base. The worm differs in no re- 

 spect from nebulo, except in being more commonly dark greenish. 

 There is probably but one brood a year, and as with nebvlo the larva 

 passes the winter in a partially groAvn condition. As it lives in the 

 summer on a compound leaf, it very wisely abandons this leaf and 

 anchors its case firmly to the more enduring twig before winter sets 

 in." 



A difficulty has presented itself in connection with this insect 

 which I have not been able, satisfactorily, to settle. The insect is 

 ordinarily known as juglandis Le Baron. It was described by 

 Le Baron in the 2d Report Illinois Insects. The same insect was de- 

 scribed by Prof. Riley under the same name in the 4th Rept. Ins. Mo. 

 Which description was first published I have as yet been unable to 

 ascertain. The probabilities are that Prof. Riley's report first saw 

 the light. It is a custom of courtesy to give a name to another 

 author as his mss. name, but I do not think this possible under 

 present zoological ideas. The first publisher of the name has pri- 

 ority, and the name stands as his. Were I certain of the dates of 

 publication, and knew that of Prof Riley's to antedate that of Le 

 Baron, I would write the species juglandis Riley. But in view of 

 the uncertainty, I follow the method of the i)ast. 



PIESMOPODA Zell. 

 (Type rubicundella Zell.) 

 Isis 1848. p. 606-863. 



Labial palpi asceudiug, exceediug head, the end member rather long ; maxillary 

 palpi distinct, filiform ; tongue strong ; ocelli distinct; antenuse of % thick, ob- 



