abstracts: entomology 105 



Stromboli during the visit of A. I^. Day and the authors in August 1914. 

 Analyses of the lavas are also given. The augite is shown to be of a 

 commonly occurring type. The paper is part of an investigation on 

 the augites and other pyroxenes of ItaUan and other localities. 



H. S. W. 



VOLCANOLOGY. — The representation of a volcano on an ItaUan 

 renaissance medal. H. S. Washington. Art and Archaeology 

 7: 256-263. July-August, 1918. 



This paper describes a lead medal of Leonello Pio, Count of Carpi, 

 which dates from the beginning of the sixteenth century. The re- 

 verse represents a volcano in violent eruption, and it is shown that this 

 commemorates almost certainly an eruption of Vesuvius in 1500, 

 concerning the actuality of which there has existed considerable doubt. 

 If so, this is the earliest known representation of Vesuvius in eruption. 



H. S. W. 



ENTOMOLOGY. — Comparative morphology of the order Strepsipieras 

 together unth records and descriptions of insects. W. DwighT 

 Pierce;. Proc. U. S. Nat. Mus. 54: 391-501, pis. 64-78. 1918. 



This article comprises the second supplement to a monographic 

 revision of the order Strepsiptera published as Bulletin 66 of the United 

 States National Museum. It contains additional biological studies 

 on the occurrence of parasitism by these insects, and a review of all 

 literature on the order which has been published since the first supple- 

 ment. The leading feature of the article is the study of the com- 

 parative morphology of the order, tracing the modification of the various 

 portions of the thoracic structures especially throughout the group. 

 It is shown that the prescutum of the metathorax from being a trans- 

 verse separate piece moves backward into the scutal area in the form 

 of a triangular piece, and in .successive modification tends to supply 

 the scutum and approach, and even push backward the scutellum. 

 It is shown that the changes in the thoracic structure can be coordinated 

 with the antennal and wing structures which have previously been used 

 for separating the families and genera. A more complete argument 

 as to the reasons for separating the group as an order is presented to- 

 gether with a set of five rules for the formation of an insect order. 

 A number of new species and genera are described and illustrated, and 



