THE CAJS'ADIAN ENTOMOLOGIST. 



77 



Pody above black, thickly covered with streaks and dots of yellowish 

 white. Second segment without spines, bnt with a row of yellowish tubercles 

 in their place. Third segment with four branching spines all black, with a 

 spot of dark yellow at their base. The fourth segment has also four spines; 

 but all the others have seven excepting the terminal which has two pairs, one 

 situated behind the other. Spines yellow, with blackish branches, excepting 

 the terminal pair, which are black, and a row along each side near under sur- 

 face of a reddish color. 



Under surface yellowish grey, darker on the anterior segments, with a dark 

 central line and many small black dots. Feet black and shining, ringed 

 with dull whitish. Prolegs with a dull reddish tint. 



This larva feeds also on the Elm. Two broods of the perfect insect appear 

 during the season ; the first late in June, the second in August. I think 

 the winter is passed in the imago state, although I have never met with the 

 larva early in the season. 



NEST OF CRABRO SEXMACULATUS, SAY. 



BY WILLIAM COUPER, OTTAWA, ONT. 



To your readers who study Hymenoptera, it may be interesting to learn 

 something of the economy of a little Ree which was found 

 at Quebec, by Mr. N. II. Cowdry, on the 11th April, 1865. 

 The wood cut represents tops of raspberry canes, the pith of 

 which was bored into, and emptied out by the parent Bee- 

 1. Orifice which was closed with some kind of vegetable sub- 

 stance. 2. Egg* of Bee attached to Pollen. 3. Pollen, all 

 of which, under the microt-cope, appeared to have the same 

 form and color (yellow), evidently mixed with honey. 4. 

 Vegetable partitionf on which the pollen rests, dividing one 

 cell from another. 5. Ejecta menta of larva. 6. Larva. 7. 

 Length of larva prior to change. As soon as the larv83 con- 

 sume the equal quantity of food provided by the parent, each 

 about the same time transforms into a pupa — but before this change, the 

 force of nature constrains it to be further secured within the walls of its cell, 

 and the final work of the larva, is to spin a thin silken cocoon wherein the 



* On splitting open one of the canes on the 11th April, five cells contained pollen, 

 and a flesh colored egg rested in a sub-vertical position on the surface of each cell. 



f ''■ It is necessary for the proper growth of her progeny, that each should be sepa- 

 rated from the other, and be provided with adequate food. She knows exactly the 

 amount of food which each grub (larva) will require during its growth ; and she there- 

 fore does not hesitate to cut it off from any additional supply." — J^isect Architechire, 

 vol. I. p. 52. 



