1.90 



HYMENOPTERA. 



141. MEGACHILE PUGNATA. B.M. 

 Megachile pugnatus, Say, Bost. Journ. Nat. Hist. i. 408 (1837). 

 Hab. North America. 



142. MEGACHILE PRUINA, n. s. 



Female. Length 6 lines. Black, the face on each side covered 

 with snow-white pubescence ; the three basal joints of the an- 

 tennae black, the rest of the joints testaceous beneath ; the sides 

 of the thorax covered with snow-white pubescence, a small tuft 

 of the same colour behind the tegulae ; wings subhyaline, their 

 apical margins fuscous, nervures black; the legs have a thin 

 snow-white pubescence, that on the tarsi beneath dark brown ; 

 the claws ferruginous, their tips black ; the calcaria pale testa- 

 ceous. Abdomen obconic, the four basal segments have a deep 

 transverse depression; the sides of the basal segment and the mar- 

 gins of all the segments laterally fringed with white pubescence ; 

 the apical segment covered with short hoary pile ; the whole ab- 

 domen has a scattered short black pubescence; beneath, the 

 pollen-brush white. 

 Hab. United States. (Coll. F. Smith.) 



143. MEGACHILE LANUGINOSA, n. s. B.M. 



Female. Length 4^ lines. Black, on each side of the face is 

 a little snow-white pubescence, on the upper part of the head it 

 is very sparing and black, as it is also on the disk of the thorax ; 

 on the cheeks, sides of the metathorax, prothorax and basal seg- 

 ment of the abdomen it is white, and has a downy appearance ; 

 the rest of the abdominal segments have a lateral short white 

 marginal fringe ; wings subhyaline, their apical margins faintly 

 clouded ; the brush on the abdomen beneath pale yellowish white. 



Male. Length 4 lines. Head wider than the thorax, anterior 

 legs simple, the claw-joints ferruginous, the margin of the apical 

 segment jagged irregularly. The specimen in bad condition. 

 Hab. St. John's Bluff, East Florida. (Coll. E. Doubleday.) 



144. MEGACHILE BIDENTATA, n. s. B.M. 



Male. Length 5 lines. Black, the face thickly covered with 

 a bright pale ochraceous pubescence, that on the thorax is of a 

 similar colour ; the wings subhyaline, slightly clouded at their 

 apical margins, the nervures ferruginous ; the anterior legs have 

 their coxse unarmed and their tarsi simple ; the femora beneath 

 fringed with long pale pubescence, that on the tarsi beneath is 

 pale fulvous. Abdomen, the apical margins of the segments 

 have a fascia of pale pubescence, and the fifth and sixth densely 



