Fammty—SIRICIDA. 115 
Species 4—SIREX DIMIDIATUS. 
Puate XXI, Fic. 5. 
Niger : abdomine fascia basali dimidioque apicali fulvis ; antennis 21-articulatis nigris, articulis 10 apicalibus 
sensim brevioribus, albis ; capite punctato, macula parva utrinque fulva pone oculos, mandibulis et palpis nigris ; 
thorace nigro, punctato ; abdomine opaco, segmento basali segmentisque 4 apicalibus cum corniculo fulvis ; hoc 
basi angustato et ante apicem dilatato, lateribus serrulatis ; terebra nigra ; pedibus nigris, basi tibiarum 2 posti- 
carum et articuli basalis tarsorum albida. 
Long. corp. (excl. cornicul. apie. et oviduct.) lin. 18; expans. alar. antic. lin. 24, 
Habitat; America Septentrionalis, arboribus terebinthinis (Raddon). In Mus. Hopeiano Oxonie (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. 
Species 5—SIREX MORIO. 
Puate XXI, Fic. 6. 
Elongatus gracilis, chalybxo-niger, rugoso-punctatus: abdomine fulvo, sezmentis duobus basalibus nigris ; 
antennis nigris 22—23-articulatis ; pedibus gracilibus fulvis, femoribus nigris ; alis nigricantibus purpureo-nitidis ; 
abdominis segmento secundo margine postico fulvo, seemento ultimo impressione magna rotundata dorsali, apice 
conico in corniculum breve lateribus serratum terminato, oviductu ultra apicem corniculi, vix lineam longi- 
tudine excedente. 
Long. corp. (eum corniculo) lin. 15; expans. alar. antic. lin. 24, 
Habitat; America Septentrionalis, arboribus terebinthinis (Raddon). In Mus. Hopeiano Oxonie (olim 
nostr.) 
This species agrees with 8. nigricornis Faby., 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 sub- 
costal 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 third segment, and the legs are pitchy. The wings are also less 
strongly coloured than in the larger specimens. 
Species 6—SIREX ABADDON. 
Prats XXI, Fie. 7. 
Elongatus, cyaneo-niger, punctatus : abdomine chalybxo, seemento ultimo supra ad basin impressione magna 
rotundata, corniculo brevi conico acuminato lateribus serratis et ad basin utrinque tuberculo parvo instructo ; 
antennis 21—24-articulatis, oviductu pedibusque nigris; alis nigricantibus. 
Long. corp. (oviductu exclus.) lin. 11-15; expans. alar. antic. lin. 173-24. 
Habitat ; America Septentrionalis, arboribus terebinthinis (Raddon). In Mus. Hopeiano Oxonie (olim 
nostr.) 
We 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 antenne than the larger ones. 
The long second submarginal cell forms quite a sharp point at its base; and the vein closing the long basal 
subcostal cell emits a short branch near its extremity, forming a small incomplete baso-discoidal cell. 
Q2 
