WA 
Hymenoptera aculeata collected in Algeria: the Sphegidae. 127 
specimens all the black ‘side-spots are surrounded with 
yellow entirely. But they are associated (in both sexes) 
with a character which I think more important, viz. in 
elaripennis the wings are entirely unclouded, in hemixan- 
thopterus always strongly clouded, and to exactly the same 
extent in all my specimens. The only 2? among my ten 
captures is coloured precisely like the $7, and therefore 
very differently from hemixanthopterus 9. Mr. Katon’s 
2 was evidently similarly coloured in life, but has suffered 
much from cyanide. (The resemblance between these 
species and our commonest forms of Vespa, e.g. vulgaris 
and germanica, is really quite extraordinary, but of course 
entirely superficial.) 
d@ antennarum flexione apicali et metatarsi intermedii structura 
hemixanthoptero affinis, illis vero ante apices haud infuscatis et 
articulis evidenter magis elongatis. 
Pictura in ¢ et 2 paene eadem. Flava sunt, facies sub antennis 
tota cum mandibularum parte basali et oculorum orbitis interioribus: 
collare, tegulae, tuberculi humerales, macula (haud magna) meso- 
pleuralis, latera mesonoti, scutellum, striga transversa postscutell, 
segmentum abdominis apicale totum, et reliquorum segmentorum 
fasciae fere ut in hemixanthoptero g sed inter se nigredine basali 
segmentorum magis evidenter separatae. Fascia segm. 1™ con- 
tinua, 2" distincte quamvis anguste (per vittam nigredinis) in 
medio interrupta, reliquorum incisae quidem plus minusve profunde 
sed tamen continuae. Segmentorum 2-5 fasciae flavae maculam una- 
quaeque utrinque nigram vel totam, vel saltem lateraliter posticeque, 
includunt. Pedes flavi, vel partim subrufescentes. Antennae in 
utroque sexu usque ad apicem testaceae, scapis flavo pictis. Caput 
postice, thoraxque infra nigra. Abdominis venter niger flavo- 
fasciatus, fasciis plus minusye angustatis atque interruptis, apice 
toto flavo, 
Long. ¢ 15-20 mm., 9 22 mm. 
SPHECIUS, sp. ?° 
lite dniskia," 25; yy 98s", Wad. M, 
This specimen is no longer in my possession. I gave it 
away without keeping note of it, and the above record is 
quoted from the “ Hymenopteren-Studien” of Dr. W. A. 
Schulz, who states that it has found its way into the 
Strassburg University Museum. 
Dr. Schulz considers it to be a form of antennatus, Klug ; 
but his very careful and detailed description of the speci- 
