( Ixxxii ) 



1. Gynandromorphous Hylaeus (Prosopis) hrevicornis. 



In this specimen the clypeus was black ($ character), the 

 left side of the face and the left antenna and all the legs on the 

 same side were ?, but the corresponding parts on the right 

 side and the whole abdomen, including the genitalia, were <?. 

 As to the thorax, he did not know whether in this species 

 there were any characters to be found there which were not 

 common to both sexes, but at any rate he could not detect any 

 such characters in the present specimen. 



2. Halictus laevigatus o- 



In this specimen there were only two cubital cells in each 

 upper wing, as in D%ifo%irea, Halictoides, etc., but in all other 

 res})ects it was a perfectly normal example of its species. 



3. A larva (in spirit) and numerous imagines — all 2 ?( !) 

 — of the Sawfly Pteronus (Lophyrus) sertifer {= " Tenthredo 

 pectinata rufa " of Retzius) with cocoons from which they 

 emerged. 



The larvae were found at Camberley on June 9, 1915, feed- 

 ing gregariously on " needles " of a young pine-tree. The 

 first cocoon was formed on June 15, and over a hundred were 

 completed by the end of the month, some among the leaves of 

 their food-plant, but mostly on the sides or flat bottom of the 

 breeding-cage, to which they sometimes adhered very tightly ; 

 many of them were consequently flat (and not convex) on the 

 lower side. Imagines began to emerge, always during bright 

 sunshine and generally between 10 a.m. and midday, on 

 Sept. 12; from 2 specimens up to 6 or 7, according to the 

 amount of sunshine, came out daily all through the same 

 month, and were still doing so. 



It was curious that several of the insects very shortly after 

 emergence, but never at any later time, seized in their man- 

 dibles and bit through one (always only one) of their own 

 antennae. Miss Chawner had told him that individuals of 

 the commoner species pini, when confined together, attack 

 and mutilate one another in tlie same way. But in this case 

 the injury was always, and could only have been, self-inflicted, 

 since every individual was removed from the cage and isolated 

 directly it came out of the cocoon ! 



Cameron had stated that the only " definite locality " that 



