1908] FROST ~ ATTELABUS RHOIS AXD PARASITE 29 



rising to the full length of its legs, it would then be able to insert the end of its oviposi- 

 tor, and it was thrust down into the roll sometimes by twisting and turning the body 

 as if the entrance was rather difficult. When the ovipositor was in full length, the 

 center of the body was touching the leaf and the tip of the abdomen pointing up into 

 the air, making nearly a right angle with the head and thorax. This operation occu- 

 pied only a second or two, and one parasite was seen to oviposit, or, at least, to thrust 

 the ovipositor down into the same roll sixteen times during the formation of the nest. 

 The female weevil did not notice the parasite even when it was within a quarter of 

 an inch of her. The male weevil was patrolling the roll while the parasite was ovi- 

 positing and only once did he seem to interfere Avith its work. A sudden shower 

 stopped these observations and another favorable opportunity did not occur. 



Specimens of the weevil and parasite were sent to Washington where Dr. Chit- 

 tenden identified the weevil as Aitelabus rhois, Boheman, and Dr. Ashmead pro- 

 nounced the parasite to be Omphale (Eudcrus) elongatus, Ashmead. It had not been 

 recorded before as an enemy of the weevil. 



A number of alder rolls were brought from Maine in 1904 and opened at different 

 dates. The following notes were made: 



On July 30th one was found to contain a yellowish, shrunken larva, bent at right 

 angles in the middle, and" apparently just alive. There was also found in this roll a 

 smaller white larva, slim and straight, about 1 mm. in length. A large yellow larva 

 in plump condition v,^as found in another roll and no parasite. This larva was 2.5 

 mm. long and covered with whitish hairs which were longer and pointing forward 

 on the thoracic segments. The head and jaws were of a chestnut color. It was 

 flattened beneath and seemed incapable of straightening itself from its curled-up 

 position. 



On September 4th I opened all the remaining alder rolls and found the inmates 

 dead probably from mould. In one nest were three small larvae, apparently Hyme- 

 nopterous. 



The investigations of the habits of this weevil has brought out the peculiar fact 

 that while the Vt^eevil feeds and makes its nest upon the alder {Alnus incana) in Maine, 

 in Massachusetts, as far as I have yet been able to discover, it makes its rolls from the 

 leaves of the hazel (Corylus americana) . I found one instance where it had fed on the 

 leaves of this species of hazel in Maine, but the bush was growing beside an infested 

 alder and the branches were intermingled. I have never taken the adult weevil on 

 the hazel in Massachusetts, in fact, during the past seven years I have taken but two 

 specimens in this state. 



On August 6th, 1904, 1 secured a dozen or more nests from the hazel in Framing- 



