

ENTOMOLOGICAL NEWS 



AND 



PROCEEDINGS OE THE ENTOMOLOGICAL SECTION 



ACADEMY OF NATURAL SCIENCES, PHILADELPHIA. 



VOL. XII. MARCH, 1901. No. 



CONTENTS: 



Calvert On Gomphus fraternus, ex- Robertson Synonymy of Prosopis. ... 77 



turnus and crassus (Odonata) 65 Foster Results of Breeding Moths of 



Cockerell A New Andrena from Call- the Genus Haploa Hiibner 



fornia 74 Editorial 84 



Wenzel The Coleoptera found in a Entomological Literature 85 



Barn 75 Notes and News 89 



Davis Cecropia Cocoons 76 Doings of Societies 92 



On Gomphus fraternus, externus and crassus 



(Order Odonata). 

 By PHILIP P. CALVERT. 



Some time ago, when some western Gomphi were submitted 

 to me for identification, I had considerable difficulty in deter- 

 mining them. Correspondence with Messrs. Williamson, Hine, 

 Adams and \Veith ensued, resulting in generous offers on their 

 part to place their material related to (r. frafcnn/x Say, at my 

 disposition for study. I thankfully accepted, since the chief 

 obstacle, in wr way at least, was lack of material. As the out- 

 come of careful comparative study, I have the following notes 

 to present, which, I am led to think, may be of use to others 

 beside myself. Of the three closely related species, whose 

 names stand at the head of this article, I have examined the 

 following individuals : 



(i. /nitcni/is Say, 19 17 9 ; <i. externus Selys, 4 & 69: 

 G. crassus Hagen, 20 3 9 . 



The differences between these three species are as follows ; 

 they are arranged, approximately, in order from the lea-t 

 variable to the more variable. 



