522 Mr. E. Saunders on Hymenoptcm AcuUata : 
Very closely allied to freyf/essneri, Kolil, with which it seems 
to agree in nearly all structural characters except that the vertex is 
slightly wider in proportion : but in colour and ]mbescence it 
differs so strikingly that I am describing it as new. 
^ 9 • Head and scape of the antennae entirely clothed with 
shining silvery hairs. Mandibles more or less testaceous-red, 
clothed with silvery hairs at the base ; vertex between the eyes 
about as wide as the second and half the first joint of the flagellum 
taken together. Thorax and propodeum entirely clothed with 
silvery hairs (these are more brilliant in the 9 than in the d)- 
The disc of the mesonoturn in my only 9 is more or less rubbed, 
and the surface is dull and exceedingly closely punctured ; wings 
very clear and hyaline, tegulae and nervures very pale testaceous. 
Legs in the black, with all the tarsi, the entire posterior tibiae, 
the intermediate and anterior tibiae, i^osteriorly testaceous, anteriorly 
piceous ; in the 9 S'!! the legs are clear testaceous and clothed with 
silvery hair.s, the front femora anteriorly and the front and inter¬ 
mediate coxae black ; abdomen clear testaceous. Each segment in 
the 9 bears a wide aj^ical band of silvery hairs covering nearly half 
of the 1st and 2nd segments, | of the 3rd and the whole of the 4th 
and 5th ; the apical dorsal valve is clothed with slightly golden 
hairs; in the the disposition of the hairs is very similar, but they 
are less vividly silvery, and the bands are narrower, the hairs of the 
5th and 6th segments are golden, and the dorsal valve is silvery. 
Beneath shining and glabrous in the 9 > iu tlie S sparsely clothed 
with adpressed golden hairs. 
Long. 12-13 mm. 
[Biskra, 22. v, 27. A. E. E. Types ^ and 9 Coll. 
Saunders.] 
6. Tachytes aenea, n. sp. 
(J. Aeneus argenteo-aureopilosus, tegulis tarsis que testaceis, 
alarum nervis piceis, thorace pilis erectis densissime vestito, pro- 
podeo linea central! nitida impres.so, abdomine pubescentia argentea- 
aurea dense vestito. 
[Here is added in the margin a pencil annotation “ changing in 
different lights.”] 
(J. Bronzy, densely clothed with golden-greyish hairs, tarsi tes¬ 
taceous, vertex between the eyes about as wide as the 2nd and 3rd 
joints of the flagellum together, antennae rather short, joints of 
the flagellum not twice as long as wide, face so densely covered 
with hairs that the sculpture is invisible— these hairs in certain 
