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REPORT OF THE SECRETARY OF THE 



Vakiety Rufus — Head, thorax and most of first abdominal joint 

 entirely rufous, with the middle and hind tibiae dusky, and the ovipositor 

 three times as long as abdomen, and projecting more than twice its 

 length beyond its tip. 



Described from three females bred promiscuously with the others. 

 This variety is slightly larger and differs so remarkably from the normal 

 form that, were it not for the absolute correspondence in all the sculptvu:- 

 ing of the thorax and body, and in the venation of the wings, it might 

 be considered distinct. The greater length of the ovipositor is very 

 characteristic and accompanies the other variations in all three of the 

 specimens. 



[FlQURB 6.] 



Porizon Curcullo Parasite : (a) female, (6) male, (>') antenna. 



The other parasite works in very much the same manner, 

 hut instead of issuing the same summer as a fly, it remains in 

 its somewhat tougher and more yellowish cocoon all through 

 the fall and winter, and does not issue in the winged state till 

 the following spring. This parasite was first discovered by 

 Dr. Trimble, who sent me the cocoons from which I subse- 

 quently bred the perfect fly. It belongs to the first sub-family 

 {IcJinewnonides) of the Ichneumon-flies, and apparently to the 

 genus Porizon^ of which it forms a new species. But I shall 

 here also, in this reading, omit the technical descrijition which 

 follows, and will only state that it differs from the other species 

 in its reddish-brown abdomen, as well as in form, as may be 

 readily seen by referring to the figures (Fig. G, a, female ; h, 

 male ; c antenna). 



* As I am informed by Mr. E. T. Creeson of Philadelphia, who pays especial atten- 

 tion to the classification of the Ichneumonidae, it mifjht more properly be referred to 

 Holmgren's genus Thersilochus, which differs from Porizon in the greater distance 

 between the antennae at base, and in the venation of the wing. 



