Grabwespen. 673 



dünntem und abwärts gebogenem Kopfende. Das Rückengefäss 

 schimmerte dunkler durch, die drei letzten Segmente waren 

 gelb, die hornigen braunen Kiefer hatten schwarze Spitzen. 



Disconzi's Angaben (1865) enthalten gar nichts Neues. 



Walsh und Rilev (1869) sagen von B. fysciata (— Spi 

 nolae nob.): 



»We have ourselves observed a very common Digger- 

 Wasp burrowing in a sandy spot of ground, and provlsioning 

 the nests which it has thus constructed, with the common Shi- 

 lling green blowfly (Musca Caesar, L.). We have observed too, 

 on passing over sandy plains frequented by these last insects, 

 that they will often fly round and round one's person in rather an 

 alarming manner, though we have never known them to sting 

 under such circumstances. Their object, no doubt, is to distract 

 the attention of the intruder, and prevent him from noticing or 

 disturbing their nests. St. Fargeau observed similar facts with 

 regard to a European species (B. rostrata) — which, like our 

 common species, provisions sits nest with two-vvinged flies — 

 and states that, as soon as he set himself down a little vvay off, 

 and remained perfectly still, the insects took no further notice 

 of him. It is a good illustration of what has been called the 

 Unity of Habits in insects, that all the species of this genus, the 

 habits of which are known, whether in Europe, or in America, 

 Provision their nests with two-winged flies (Diptera), and exclu- 

 sively with such as belong to the Second Grand Division (Bra- 

 chycera) of the Order. 



Packard (Guide to the Study. 1870) reproducirt zu- 

 nächst die von Westwood compilirten Angaben und sagt 

 dann : 



Du f our states that two Diptera, Panopeä carnea and 

 Toxophora fasciata, the latter allied tho Systrophns, are para- 

 sits on Bembex. Mr. F. G. Sanborn has noticed the exceedingly 

 swift night of our common Bembex fa sei ata on sandy beaches, 

 where it is found most abundantly. 



Ich konnte weder die betreffende Arbeit Dufours, noch 

 die Sanborn 's auffinden, glaube aber trotzdem behaupten zu 

 können, dass die Fliege »Panopea eavnea« mit der Wespe 

 Parnopes caruea identisch ist. 



