ENTOMOLOGICAL NEWS 



AND 



PROCEEDINGS OF THE ENTOMOLOGICAL SECTION 



ACADEMY OF NATURAL SCIENCES, PHILADELPHIA. 



VOL. XVIII. 



APRIL, 1907. 



No. 4. 



CONTENTS: 



Needham The Eggs of Benacus and 

 their Hatching 113 



Smith and Grossbeck Studies in cer- 

 tain Cicada Species 116 



Skinner-Studies of Thecla irus Godart 

 and T. henrici Grote and Robinson 129- 



Aldrich The Dipterous Genus Scellus, 

 with one new Species 133 



Doaue Notes on the Habits of Scellus 

 virago Aid 136 



Daecke Annotated List of the Species 

 of Chrysops occurring in New Jer- 

 sey and Descriptions of two New 

 Species 139 



Grossbeck Notes on some Species of 



Geometrids ' 146 



Knab The Classification of the Culi- 

 cidae according to Scale- Vestiture 



Characters 151 



Carpenter Cards for Data 155 



Baker De Luxe Editions of Entomolo- 

 gical Works 157 



Editorial 160 



Notes and News 161 



Doings of Societies 163 



The Eggs of Benacus and Their Hatching. 



By JAMES G. NEEDHAM. 



(Plate II) 



Among the largest of insect eggs are those of our aquatic 

 Hemiptera. Some of these are laid under water, some in the 

 air, attached to the stems of plants that project above the sur- 

 face. Few are better known than those of Zaitha, which the 

 male carries through their incubation period in a layer covering 

 his back. Those of Ranatra are familiar enough also, though 

 immersed in the stems of aquatic plants : their presence is 

 always betrayed by the two long micropylar appendages that 

 project conspicuously into the water. Bclostoma and Benacus 

 lay their eggs above water, commonly attaching them in broad 

 one-layered clusters to the vertical sides of dead typha stems. 

 Those of Bclostoma have recently been carefully described by 

 Mr. Rueno. It is strange that those of Benacus, the largest 

 of them all, should still remain comparatively unknown and 

 unnoticed. 



