16 BULLETIN OF THE LIVERPOOL MUSEUMS. 
succeeding ones together, terminal joint of the middle tarsi ending in a hairy — 
pad, somewhat resembling that in some bees, such as Podalirius acervorum. 
Wings with one radial and three cubital cells, the radial cell broad, obtuse at 
the extremity, and not appendiculate ; first dial cell oblong or a oval, as 
long as the third cell in the male, but shorter than in the ale ; second cell 
nearly square, smaller in the male than in the female, third much narrower 
above than below ; first recurrent nervure received close to the extremity of 
the second radial cell ; second at about } of the extremity of the third cell. 
This is a very strange insect, which has the appearance of a bee, although 
the long slender cylindrical tarsi seem to exclude it from the bees. I am 
inclined at present to refer it to the Sphegidw, in which group it may perhaps 
form the type of a new sub-family. 
(6) Pseudapis anomala. 
Black, face below the antenne, hinder orbits, pectus, hind borders of 
scutellum, postscutellum, and abdominal segments, base of abdomen, and legs 
in front covered with white pubescence or pile. Antenne, tegule and legs 
rufo-testaceous, femora, more or less of tibiz above, and terminal tuft on 
middle tarsi, black ; antenne thickly and finely punctured ; the body thickly 
punctured almost everywhere, the front of the abdominal segments less 
closely than the thorax, because the punctures are much larger ; hinder part 
of the abdominal segments more finely punctured, or smooth. 
Moukaradia (600 ft., 15. I. 99); two specimens ¢ ; 9. Homhil, E. 
Sokotra (1500 ft., 26. I. 99). 
(7) Tachytes trivittatus. 
3 Long. corp. 10 mm. ; exp. al. ant. 8 mm. 
? Long. corp. 15 mm. ; exp. al. ant. 11 mm. 
Black, sides of fore and hinder orbits clothed with silvery pile, legs black, 
femora and tibiz clothed with very fine whitish pile, tarsi reddish, thorax 
closely and finely punctured, median segment somewhat more coarsely 
punctured, bordered with w hitish pubescence, first three segments of abdomen 
with terminal band of pale blue pile. Wings purplish hy aline, darkest on 
the margins. 
Sokotra : Homhil, East Sokotra (1500 ft., 21. I. 99); and Addah Valley, 
East of Hadibu Plain, 29. I. 99 ; three specimens. 
Notogonia, Costa. 
(8) Notogonia bicolor. 
Long. corp. 8 mm. ; long. al. ant. 6 mm. 
Female. Black, tegulze reddish, legs, except the black cox and trochanters, 
red ; tarsi a little ‘brownish above. Median segment about as long as the pre- 
ceding part of the thorax ; dull, thickly punctured, the rest of the body 
shining. Wings clear hyaline. 
Sokotra : Adho Dimellus (3000 ft., 18. IT. 99); one specimen. 
A very distinct species. 
Stizus, Latreille. 
(9) Stizus scutellaris. 
Long. corp. 19 mm. ; long. al. ant. 14 mm. 
Female. Black, varied with yellow, and slightly with red. Head black 
above the antennz ; back of head, and tips of mandibles also black. Vertex 
