I t B
114 O R D E R — I I Y M E N O P T E R A .
GENUS—SIREX.
SPECIES 1—SIUEX FULVOCINCTUS. (Mas.)
PLATE XXI, FIG. 1.
Niger, punctatns, nigro-setosus: thoracis segmento postieo can-iilescente; abdomine purpureo-nigro, segraentis
duobus intennediis late aurantiis; aiitennis caput et tlioraeem ajquaiitibus 19-articulatis, artieiilis 3tio,
4to, et 5to fulvis (liujus apice nigro); pedibus iiigris, tibiis tarsisque quatnor auticis fulvis; basi tibiarum et
articulo 4to et basi 5ti tarsoruin in pedibus 2 posticis, etiam fulvis; horum tibiis tarsisque compressis; alis
liallide fulvis inargiue postieo fuscescente, stigmate venisque brmineis.
Long', corp. lin. 10 ; expans. alar, antic, lin. 16.
H a b i t a t ; America Septentrionalis. lu J\Ius. Hopeiauo Oxoui».
The vein which closes the hind part of the first submarginal cell is united to the vein which closes the
anterior basal subcostal cell, at a slight distance from the origin of the vein which forms the long posterior
margin of the long second submarginal cell, and the median vein throws off a short branehlet before its
extremity, forming a small incomplete irregular 5-sided discoidal cell.
SPECIES 2—SIREX I^MFASCIATUS. (Mas.)
PLATE 5X1, FIG. 2.
Niger, punctatus, setosus : abdomine purpurascente nigro; segmentis 2do, 3tio, 4to, et 5to fulvis ; antenuis
23-articulatis, articulo 4to et sex sequentibus obscure rufis; apicibns sensim nigricantibus ; capite convexo, ano-uhs
duobus posticis pone oculos flavis ; eollaris angulis anticis porrectis fulvis; abdomine subopaco margine postieo
segmentorum nitido ; apice aeuto, serrulato ; femoribns omnibus nigris tibiis et tarsis 4-auticis fulvis, tibiarum
compressarum 2 postiearum basi albida, tarsorum articulis duobus apiealibus sub-fulvis; alis obscm-e fulveseentibus
apice vix obscurioribus, stig-mate brunneo.
Long. corp. lin. 1 0 | ; expans. alar, antic, lin. ISA.
H a b i t a t ; America Septentrionalis. In Mus. Hopeiano Osonite.
The vein which closes the hind portion of the first submarginal cell is continuous with the vein at the end
of tlic long anterior or subcostal cell, causing the first submarginal cell to be shorter and more oblique than in
the preceding species; and the vein which forms the hind margin of this anterior or subcostal cell does not emit
a branch near its apex, so that the small incomplete discoidal cell seen in the preceding species is here wanting.
SPECIES 3—SIEEX GRACILIS.
PLATE XSI, FIG. 4.
Species quasi intermedia inter 8. Aladdon et S. sjaectrum. Elongatus cylindricus, cyaneo-niger, punctatissimus,
abdomine magis purpurascenti, segmento ultimo sensim ad apicem acuminato, et serrulato; oviductu dimidium
abdominis longitudine ¡equanti; antennis elongatis nigris gracilibus 2I-articulatis, fere ad medium abdominis
attingentibus ; pedibus nigris gracilibus ; alis nigricantibus purpureo parum tinctis.
Long. corp. lin. 12; oviduct, ultra apic. abdom. lin. 4 ; expans. alar, antic, lin. 16^.
H a b i t a t ; America Septentrionalis, arboribus terebinthinis (Eaddon). In ;MUS. Hopeiano Oxonia; (olim
nostr.)
The abdomen is rather more than twice the length of the head and thorax. The portion of the ovijjositor
which extends beyond the serrated apex of the abdomen equals half the length of the whole abdomen, to which
also the wings are equal in length. The vein which closes the first submarginal cell forms a regular curve with
that which closes the hind part of the extremity of the long subcostal cell. The vein which closes the hind
margin of this cell emits a small branch near its apex, forming a small incomplete discoidal cell.
F A M I L Y — S I R I C I D / E . 115
SPECIES 1—SIREX DIMIDIATUS.
PLATE XXI, FIG. 5.
^ Nige r abdomine fascia basali dimidioque apicali fulvis; antennis 21-articulatis nigris, articulis 10 apiealibus
sensim brevioribus, albis ; capite punctato, macula parva utrinque fulva pone oculos, mandibulis et palpis nigris;
thorace nigro, punctato ; abdomine opaco, segmento basali segmentisque 4 apiealibus cum eorniciüo fulvis; hoc
basi angustato et ante apicem dilatato, lateribus serrulatis; terebra nigra ; pedibus nigris, basi tibiarum 2 postiearum
et articuli basalis tarsorum albida.
Long. corp. (excl. cornicul. apic. et oviduct.) lin. 13; expans. alar, antic, lin. 24.
H a b i t a t ; America Septentrionalis, arboribus terebinthinis (Raddon). In Mus. Hopeiano Oxonife (olim
nostr.)
The vein closing the small first submarginal cell behind is separated from the base of the vein closing the
second submarginal cell by a small space, so that the first marginal cell is longitudinal rather than oblique.
The first recurrent vein is received by the second submarginal cell before the middle of the cell; the second
recurrent vein is very oblique, and received at the middle of the third submarginal cell. The vein closing the
long basal subcostal cell does not emit a short branch near its hinder extremity.
SPECLES 5—SIREX MORIO.
PLATE XXI, FIG. 6.
Elongatus gracilis, chalyba?o-niger, rugoso-punctatus: abdomine fulvo, segmentis duobus basaliljus nigris ;
antennis nigris 22-23-artieulatis ; pedibus gracilibus fulvis, femoribus nigris ; ahs nigricantibus purpureo-nitidis !
abdominis segmento secundo margine postieo fulvo, segmento ultimo impressione magna rotundata dorsali, apice
conico in eorniculum breve lateribus serratum terminate, oviductu ultra apicem corniculi, vix lineam longitudine
excedente. ^
Long. corp. (cum cornicnlo) lin. 15 ; expans. alar, antic, lin. 24.
H a b i t a t ; America Septentrionalis, arboribus terebinthinis (Raddon). In Mus. Hopeiano Oxonia3 (olim
nostr.)
^ This species agrees with S. nigriconis Eabr., except in the colour of the legs, which are described as pitchy,
with yellow thighs. The long second submarginal cell forms an acute point at its base, and the second recurrent
vein IS received by the third submarginal cell at one-third of its length from its base; and the long basal subcostal
cell emits a branch near its apex, forming a supplemental nearly square baso-discoidal cell.
A small specimen, 9 lines long and 15 lines in the expansion of the fore wings, has the dark colour of the
base of the abdomen extending nearly over the thh-d segment, and the legs are pitchy. The wings are also less
strongly coloured than in the larger specimens.
SPECIES G—SIREX ABADDON.
PLATE XXI, FIG. 7.
Elongatus, cyaueo-niger, punctatus : abdomine chalybiEo, segmento ultimo supra ad basin impressione mao-na
rotundata corniculo brevi conico acuminato lateribus serratis et ad basin utrinque tubérculo parvo instructo;
antennis 21-24-articulatis, oviductu pedibusque nigris; alis nigricantibus.
Long. corp. (oviductu exclus.) lin. 11-15; expans. alar, antic, lin. 171-24.
n o s t i O ' arboribus terebinthinis (Raddon). In Mus. Hopeiano Oxonia; (olim
Wc have two larger and two smaller specimens of this species, agreeing with the sizes given above"-
and the smaller ones have fewer joints in their antenna3 than the larger ones.
The long second submarginal cell forms quite a sharp point at its base; and the vein closing the lono- basal
subcostal cell emits a short branch near its extremity, forming a small incomplete baso-discoidal cell.
q 3