174 HYMENOPTERA. 



a deep transverse impressed line, the base covered with a thin 

 griseous pubi'scence ; the lateral niarf?ins have a short fringe of 

 the same colour, more or less continuous, rarely entire, excepting 

 on the fourth or fifth segments ; on the sixth segment, and some- 

 times extending over a ])ortion of the fifth, is a patch of fulvous 

 pubescence ; tlie pollen-brush is very pale yellow. 



Male. Length 4— 1^ lines. — In general as])cct resembling the 

 female, the mandililes very broad at their base, tridentate at their 

 apex ; the anterior legs have their femora concave beneath, are 

 of a ])ale rufo-testaceous colour, and obliquely striped at their 

 base with black lines ; the tibi<e and tarsi pale rufo-testaceous, 

 having a dark stain behind and at their base; the two basal joints 

 of the tarsi dilated, the second is produced at its apex above into 

 a rounded lolje, the inferior margin has a thick fringe of white 

 pubescence, which is stained with yellow at the edge ; the dilated 

 joints beneath have two black dots ; the coxa3 armed with obtuse 

 spines. The apical segment of the abdomen tridentate, the 

 centre tooth very short. 

 Hab. Van Diemen's Land ; Western AustraUa. 



87. Megachile ordinaria. 



Female. Length 4 lines. — Black, the face on each side has a 

 little white pubescence, the margin of the clypeus slightly eraar- 

 ginate, the mandibles covered with coarse longitudinal punctures; 

 the cheeks fringed with long white pubescence. The thorax on 

 the sides and beneath as well as the legs have a thin long white 

 pubescence ; the tarsi beneath fulvous ; the claw-joint ferrugi- 

 nous ; the wings hyaline and iridescent, the nervures ferruginous. 

 The apical margins of the segments of the abdomen have a nar- 

 row white fascia, more or less obliterated on the basal segments, 

 the basal margins depressed, the apical segment covered with a 

 short griseous pubescence ; the pollen-brush beneath the abdo- 

 men is of the same colour. 

 Hab. Van Diemen's Land. (Coll. F. Smith.) 



88. Megachile dimidiata, n. s. B.M. 

 Female. Length 6 lines. — Black, the head densely clothed 



nith bright fulvous pubescence, the clypeus and the space be- 

 tween the stemmata naked, antennae ferruginous. Thorax en- 

 tirely clothed, as well as the legs and basal segment of the abdo- 

 men, with bright fulvous pubescence ; wings fulvo-hyaline, the 

 tegulae and nervures rufo-testaceous. Abdomen, excepting the 

 basal segment, covered above with veiy short and beneath with 

 long black pubescence. 

 Hab. India. 



