HYMENOPTERA. 157 
triangular, plane above, prolonged into a point at the extremity in 
the females, and usually dentated in the males. 
These Insects approach the Megachiles, whilst the Stelides are 
connected with the Anthidia(1). 
Other Apiariz, the Cuculinz, similar to the preceding ones in 
their posterior tarsi, and in which, as in the latter subgenera, the 
labial palpi have the form of squamous setz, and the abdomen is 
destitute of a brush in both sexes; that are parasitical, like the Ceeli- 
oxydes and Stelides; sometimes almost glabrous and similar in co- 
lour to Wasps, and sometimes pilose in patches, have an elongated 
and truncated, or short and almost semicircular labrum, and nar- 
row, pointed mandibles, unidentated at most on the inner side. The 
paraglosse are frequently long, narrow, and setaceous. The scu- 
tellum in several is emarginate or bidentateds; in others it is tuber- 
culous. They are the Nomadz of Fabricius. Several of these In- 
sects appear early in the spring, flitting near the earth or about walls 
exposed to the sun, in order to deposit their eggs in the nests of 
other Apiariz. It is this habit, analogous to that of the Cuckoo, 
which induced me to name them Cuculine. 
In some, almost always glabrous, the paraglossz are much shorter 
than the labial palpi. 
Sometimes the labrum forms an elongated triangle truncated at 
the end, and inclined above the mandibles. ‘There are never more 
than two complete cubital cells. 
AMMOBATES, Lat. 
Where the maxillary palpi are formed of six joints(2). 
PuinEREMuS, Lat.—Epeolus, Fab. 
* Where these organs have but two joints(3). 
Sometimes the labrum is short, and almost semicircular or semi- 
oval. 
, Ereotus, Lat. Fab. 
_ Three complete cubital cells, and the maxillary palpi uniarticu- 
lated(4). 
$$ 
(1) Lat., Gen. Crust. et Insect., IV, 166. 
(2) Lat., Ibid, 169. 
(3) Lat., Ibid., Idem. 
(4) Lat., Gener. Crust. et Insect., IV, 171. 
