72 PROCEEDINGS OF THE NATIONAL MUSEUM vol.75 



the male, leaving a black posterior border on each tergite. The 

 sixth tergite is black and the maculations on sternites 2-5 are re- 

 duced to lateral spots. The two specimens bear a common label, 

 " S. Formosa, Taihanroku, 3.-10. VIII. 08, Sauter." 



BEMBIX FUCOSA, new species 

 Figures 104-106 



Tyfe (male). — Black: labrum; mandibles, except tips; clypeus; 

 f rons below anterior ocellus, except pair of large black spots ; scape, 

 except spot above; anterior orbits deflected inward and interrupted 

 at anterior ocellus; posterior orbits broad below, narrow above; 

 prothorax almost wholly; broad lateral lines and broken U-shaped 

 mark on scutum; narrow fascia on posterior border of scutellum 

 enlarged laterally; fascia on metanotum; prominent curved fascia 

 on posterior and dorsal surface of propodeum ; lateral angle and side 

 of propodeum; metapleura and mesopleura almost entirely; fasciae 

 on tergites 1-5 continuous, on G interrupted; first fascia narrowed 

 dorsally and bisinuate dorsally on anterior border ; second inclosing 

 a pair of elliptical black spots and deeply and acutely emarginate 

 on posterior border at dorsal midline; third similar to second but 

 with dorsal elliptical spots not entirely enclosed; fourth and fifth 

 bisinuate on anterior margin and very deeply and acutely emargi- 

 nate on posterior margin at midline; lateral spots on sternites 2-5, 

 those on sternites 2 and 3 almost united by apical prolongations ; legs, 

 except black anterior spot on middle and posterior coxae, black spot 

 on trochanters, black line above on anterior femur, and black spot 

 below on all tibiae ; creamy white or tright yellow. The maculations 

 on the head (except the frons in part and the lower part of the 

 posterior orbits), the posterior line on scutum, fasciae on scutellum 

 and metanotum, and the dorsal part of the fasciae on the tergites 

 are pale, creamy white. The longitudinal discal lines on the scutum 

 and the lower part of the large spot on the mesopleura are decidedly 

 rufous. Elsewhere the maculations are yellow. 



The antennae are dark above, fuscous below. Segments 7-10 of 

 the flagellum are dilated and obtusely prominent on posterior margin. 

 Segments 9-11 are excavated below and segment 12 is flattened 

 toward the apex, roundly pointed and strongly curved. The middle 

 femur is dentate below. The second sternite bears a prominent, com- 

 pressed, bluntly pointed process. The process on the sixth sternite is 

 peculiar in that its base is a transverse swelling, from the median 

 part of which a carina, broad at base but narrowed to an edge at 

 apex, extends in a curve to the apical margin of the sternite. The 

 seventh sternite is strongly carinate on midline. The seventh tergite 

 bears conspicuous lateral ridges and is roundly pointed at the apex. 



