294 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 7 



Of special importance was the observation made by four members 

 of the party that the bite of the fly was not always noticeable. For 

 example, the writer sat through an entire evening meal in the tent 

 with the sandfly biting on the face near the base of the nose. He was 

 not aware of its presence there until informed at the close of the meal 

 by his companions regarding the length of the time it had been there. 

 The spot, reddened in this case, and was about the size of a flax seed. 



It seems probable also that it succeeds in attaching itself to the 

 host through its mouth-parts because, when once settled down to feed- 

 ing, it sticks to the host and is not readily detached. 



Biting is not uniformly painless as sometimes the insect would be 

 detected by its first contact. 



Regarding the morphology, Mr. W. T. Emery, who has been my 

 graduate student assistant in this work, has a paper now in press deal- 

 ing with that phase of the subject. 



A second point to be here recorded is that the monkej', which we 

 used all last year to receive inoculations from the sandfly and which 

 received its last inoculation on December 22, 1912, as recorded in my 

 previous paper, late in November last year began to show a marked 

 stomatitis accompanied by a diarrhoea. She has continued to lose in 

 weight and the color of the face is changing from the normal to a pale 

 ashy gray. 



This is simply a report of progress, and as the author views it, does 

 not warrant any conclusion for or against the Sambon theory. 



NOTES ON THE BIOLOGY OF DIPLAZON LAETATORIUS 



(FABR.j 



By E. O. G. Kelly, Bureau of Entomology, United States Department of Agriculture 



The published rearing of Diplazon (Bassus) loetatorius from Syrphus 

 puparia are few. Ratzeburg mentions having reared it from Syrphus 

 balteatus in 1848 (Ichneumon d. Forstinsect.). IMr. G. C. Davis also 

 described the species in Transactions American Entomological Society, 

 Vol. XXII, 1884, and following his description, he states that it is one 

 of the most common and wide-spread species in Europe and America. 

 Mr. Bignell, in The Entomologist, Vol. XVII, 1884, states: "On 3d 

 of June, I bred this Ichneumon from a Syrphus larva, obtained last 

 October in Oreston quarry, feeding on Aphis jacobece. By end of 

 October it had changed to pupa and remained that way till above date." 

 It is figured in the Agricultural Journal of South Africa, Vol. 6, No. 3, 



