HYMENOPTEEA. 
5 
10. Megachile vigilans. 
Eemina.— M. pallide puhescens ; abdomine suhtus argenteo-mllosulo, segmentorum mar- 
ginihus dorsalibus pallido-fasciatis. 
Black; tke face clotked witli dense white pubescence; the mandibles with four blunt 
teeth. The pubescence on the thorax and legs whitish, that on the tarsi beneath fulvous; 
wings hyaline, the nervures black. Abdomen suhcordate, the basal segment deeply concave, 
the metathorax rounded and fitting into the cavity, the abdomen curving upwards, the 
apical margins of the segments with fascise of white pubescence; beneath, densely clothed 
with silvery-white pubescence. Eemale, length lines. 
Sab. —Eras, K4rgil, and Leh, all in Ladak. (August and September.) 
This genus is perhaps the most numerous in species of all the genera of bees; it is 
also the most cosmopolitan; about three hundred species are known; they occur both in 
temperate and tropical climates; about fifty are known to inhabit India, China, and the islands 
of the Eastern Archipelago; they are abundant in Australia, also in both North and South 
America. 
A large number are, from their habit of lining their nests with pieces of leaf, popularly 
called leaf-cutting bees, hut their habits vary; nests of Indian species prove that some 
species belong to the section of mason-bees, their nests being constructed of agglutinated 
particles of sand or mud; of the habits of the Australian species, we are at present ignorant. 
11. Anthihihm vigilaxs, Eig. 7. 
Eemina.— A. atrum, capite thoraceque fiavo-variegatis ; abdominis maculis lateralibus 
jiavis. Mas.— A. abdominis injlexi lateribus fasciculato-pilosis, ano septemdentato. 
Black; the head and thorax very closely punctured and suhopaque, the abdomen 
sliining and more finely punctured. The clypeus, base of the mandibles, and a line on the 
posterior margin of the vertex, interrupted in the middle, yellow. A stripe on each side of 
the thorax in front, and an interrupted line on the posterior margin of the scutellum 
yellow; the femora at their apex beneath, and the tibiae and tarsi outside, yellow; wings 
suh-hyahne, the marginal cell with a fuscous stripe at its anterior margin. Abdomen; each 
segment with a transverse yellow lateral macula; beneath, clothed with bright pale fulvous 
pubescence. Eemale, length lines. 
The male is considerably larger than the female and is much more pubescent, hut is 
marked with yellow in the same manner, the yellow stripes on the abdomen being broader 
and forming interrupted hands; the segments have at their lateral margins a floccus of 
whitish glittering pubescence; the apical segment is tridentate, the lateral teeth yellow, the 
central one smaller and black; there is also a tooth at the lateral margins of the fifth and 
sixth segments. Male, length 7 lines. 
Sab. —The locahty of the male is the neighbourhood of Yarkand, and although the precise 
locality of the female is not ascertained, there is a sufficient general resemblance between 
the sexes to justify uniting them as one species. 
The genus Anthidium has a wide geographical distribution; species are found in Europe, 
Arabia, Syria, Algeria, Cape of Good Hope, Sierra Leone. About six species are known from 
