December, '15] 



SELL: CUCUAIBER BEETLES 



515 



in a group about eight inches from the surface in a gravel bank. This 

 lot of specimens gives a series showing both the canadensis Sbud funestus 

 forms. The abundance of the species at this time is undoubtedly 

 due to the unusual numbers of the army-worm during the past summer c 

 My thanks are due Dr. J. C. Bradley who gave much assistance in 

 the determination of specimens. 



Stxoxomy of Ichneumon Icetus Brulle 

 1835. Ichneumon yaratus Bay. (male only). 



Bost. Jour. Nat. Hist., I: 228 (LeConte ed.) 

 1846. Ichneumon loetus Brulle (male only). 



Hist. Nat. Ins. Hym., IV: 303. 

 1864. Ichneumon funestus Cresson (female). 



Proc. Ent. Soc. Phi]., Ill: 166. 

 1869. Ichneumon canadensis Cresson (female). 



Trans. Am. Ent. Soc, I: 308. 

 1875. Ichneumon hoesitans Provancher (female). 



Xat. Can., VII: 80. 

 1877. Ichneumon hoesitans Prov. =funestus Cress. 



Cresson, Trans. Am. Ent. Soc, VI: 179. 



Explanation of Plate 29 

 Fig. 1. Pupa of army-worm showing the parasite before emerging; male (center) 



and female of Ichneumon loetus. 

 Fig. 2. Male of 7. Icetus approaching the female. 

 Fig. 3. Male and female cleaning antennse and wings. 



SOME NOTES ON THE WESTERN TWELVE-SPOTTED AND 

 THE WESTERN STRIPED CUCUMBER BEETLES ^ 



By R. A. Sell 



The Western Twelve-Spotted Beetle {Diahrotica soror LeConte) 



The western twelve-spotted beetle {Diahrotica soror Lec.) is often 

 called "the western flower beetle" because it is so frequently seen on 

 flowers. Terming it simply ''the diahrotica" as they do in some parts 

 of California is not satisfactory, for the danger of confusing it with 



^ This article contains an outhne of an investigation made under Mr. E. O. Essig 

 at the University of Cahfomia during the summer of 1915 (June 20 to August 30). 

 Many difficulties were encountered in the work on Diahrotica soror Lec, so that the 

 paper is for the most part a preliminary survey. With Diahrotica trivittata Manner- 

 heim it was very different since every observation tended to strengthen the behef 

 that it differs very little from Diahrotica vittata Fabricius of the Middle and Eastern 

 States. Diahrotica soror Lec. has very Uttle in common with either of the striped 

 forms. 



