206 Mr. J. O. Westwood on the Habits 



vented me from seeing where she deposited her load. A few hours 

 afterwards however, whilst standing at the door (in the side posts of 

 which various fossorial Hymenoptera had taken up their abode), I 

 heard a scratching noise in one of the open burrows, and immediately 

 afterwards the Trypoxylon made her appearance at the mouth of the 

 hole and flew off. I then stopped up the hole with a small pebble, 

 and the next day I ascertained that I had been assisting the insect 

 in so doing, as I saw her busily occupied in fetching small loads of 

 moistened sand with which she was plastering up the little crevices 

 which still remained. 



Two days afterwards I observed another burrow, which I had not 

 noticed before, filled with newly made powdered wood, and the Try- 

 poxylon was now busily occupied in making a cell at the bottom of 

 the hole with moistened sand. That the burrow was newly formed 

 was evident from the quantity of fresh-powdered wood with which 

 it was filled, and that the Trypoxylon was the architect I infer from 

 there being no other fossorial species then at work in the perfect 

 state in the door-post. 



The spider which Trypoxylon selects appears to be the young of 

 Epeira diadema, which is now of small size, and of a greenish colour, 

 and which suspends its geometric web amongst the branches of 

 shrubs. The prey of Pompilus petiolatus is a much larger silky species 

 of Lycosa. As regards the doubts of M. de Saint Fargeau relative to 

 the specific identit}' of Trypoxylon figulus with the Sphex figulus of 

 Linnaeus, it is quite evident from the shortness of the wings, and the 

 lucid margins of the abdominal segments of the Linnsean descrip- 

 tion, that it, and not Pompilus petiolatus, is the insect described by 

 Linnaeus. I might have added some observations upon the effect 

 which the facts thus confirmed will have upon the theory of M. de 

 Saint Fargeau, but his views have been so much weakened by the 

 memoir of Mr. Shuckard, as well as by some observations of mine 

 read before the Entomological Society of France, that further discus- 

 sion upon the merits of this theory seems uncalled for. 



Species of Coccus infesting the Pine-apple. — On examining the 

 leaves and fruit of the pine-apple exliibited by J. G. Children, Esq., 

 at one of the meetings of the Entomological Society in 1835, I 

 observed two distinct species of Coccideous insects parasitic upon 

 them, belonging in fact to two different genera, and having very 

 different modes of transformation and oviposition. 



The species which infests the leaves, and which I should imagine 

 from its smaller size must be the least obnoxious of the two, is more 

 properly a scale insect, or true Coccus, than the other. The male 

 larvee when full grown are of an oval and flattened shape. They 



