154 INSECTA. Tks 
All the remaining Dasygastre have four joints at most in their 
maxillary palpi, and two complete cubital cells. 
We first remark those species in which the under part of the ab- 
domen is evidently furnished with a silky brush. 
CuHELOSTOMA, Lat. 
Where the body is elongated, and almost cylindrical; the mandi- 
bles project, are narrow, arcuated, and forked or emarginated at the 
end; the maxillary palpi are triarticulated(1). 
Heniaves, Spin. 
Where the body is also elongated and almost cylindrical, but where 
the mandibles are triangular, the maxillary palpi consist of but two 
joints, and the second of the labial is much shorter than that of the 
others. ‘These Insects, like the Chelostoma, make their nests in 
holes of old trees(2). In the four following subgenera, the abdomen 
is shorter and almost triangular or forms asemi-oval. These Apia- 
riz are the Abeilles macgonnes and the Abeilles coupeuses de feuilles of 
Réaumur. 
Mecacuite, Lat.—Anthophora, Xylocopa, Fab.—Trachusa, Jur. 
Where the maxillary palpi consist of two joints; the abdomen is 
- plane above and susceptible of being elevated posteriorly, thereby 
enabling the females to employ their sting over their body. 
M. murarium; Xylocopa muraria, Fab.; Réaum., Insect., VI, 
vii, vill, 1—8. One of the largest species of the genus. The 
female is black, with violet-black wings. The male is covered 
with russet hairs, and the last of his abdominal annuli are 
black. The female constructs her nest of very fine earth, which 
she forms into a kind of mortar, applying it against walls or 
stones, with a south exposure. It becomes extremely hard and 
resembles a clod of earth. It contains from twelve to fifteen 
cells, ineach of which is deposited some bee-bread and an egg. 
The perfect Insect appears in the spring of the next year. 
Another species, closely allied to the preceding one-—Apis 
(1) Lat., Ibid., 142. 
(2) Lat., Gener. Crust. et Insect,, LV, 162. 
of 
