HYMENOPTERA — APIDE. 267 
In Dasypoda the sexes vary so much in appearance, that they have 
been regarded as distinct species. Mr. Kirby states respecting the 
only British species, that its habits are similar to those of Andrena, 
forming burrows, at the mouth of which the female sits enjoying the 
sunshine, the male circling round her. 
The exotic genus Nomia is remarkable for the curious manner in 
which the legs of the males are dilated, curved, and spined. 
The insects composing the second family of the bees, Aprpm, have 
the mentum long, with the labium at its extremity, forming an 

elongated slender seta, reflexed when at rest, and as long as, or longer 
than the mentum, with two small lateral filaments (paraglosse Jiliger, 
auricule Kirby), and forming with the maxille (which are also el- 
bowed and recurved at the place of insertion of the palpi) an elon- 
gated proboscis, capable of being porrected in front of the head when 
in action, or folded up beneath it, and the breast when at rest, in the 
shape of a flattened = (see jig. 89.). The palpi, attached at the 
base of the labium, form two slender flattened filaments often as long 
as the labium itself, the two basal joints being very long, with the two 
apical joints minute, and obliquely affixed near the extremity of the 
second joint *; the maxillary palpi vary in the number of their joints 
Réaumur has figured some other curious parasites in his Mémoires, tom. v. pl. 36. 
f. 1—8. ; and tom. vi. pl. 4. f. 13, 14., and pl. v. f. 8, 9.) belonging to the Acaride: 
and see Goeze, in Der Naturforscher, st. 14. I have also found a yery singular 
and distinct Anoplurous insect parasitic upon an Andrena. 
* In the species nearest allied to the Andrenide (Panurgus, Nomada, &c.), the 
joints of the labial palpi are continuous (fig. 91. 11. labium and palpus of Nomada). 
