116 OrpErR—H YMENOPTERA. 
Species 7—SIREX MELANCHOLICUS. 
Puate XXI, Fre. 8. 
Niger, punctatus : capite thoraceque rugosis ; abdomine nitido ; capite macula utrinque pone oculos, lateribus- 
que serratis collaris albidis ; pedibus nigris femoribus quatuor anticis rufis; alis hyalinis, nubila parva prope 
angulum posticum alteraque versus basin marginis interni, femoribus duobus posticis prope basin constrictis et 
parum contortis (constrictione articulum simulante); segmento ultimo abdominis obconico, plano, in spinulam 
parvam terminato. (Mas.) 
Long. corp. lin. 114; expans. alar. antic. lin. 16. 
Habitat ; America Septentrionalis. In Mus. Hopeiano Oxonie. 
The unique male of this species in our Collection is closely allied to the male of Sirex spectrum, which forms 
a second section in the genus in Dr. Klug’s monograph, intermediate between the genuine Sirices and Tremex, 
differing from each in the number of joints in its maxillary and labial palpi. Its general characters agree, how- 
ever, so entirely with those of Sirex (except in the greatly elongated ovipositor), that it does not appear desirable 
to separate it subgenerically from the rest. The head is convex and sloping, with a central and two lateral 
impressions in the hinder part. The thorax is coarsely granulated, the collar quadrate and transversely grooved, 
the lateral margins denticulated. The abdominal segments have the basal portion of each depressed, leaving the 
sides and hinder margins somewhat raised ; the terminal segment is obconical, slightly serrated at the sides, and 
terminated in a small point. The wings are hyaline, and almost colourless; the large second submarginal cell is 
pedunculated at its base (as it is also in S. spectrum); the vein forming the hind margin of the long basal 
subcostal cell does not emit a small branch near its extremity. The legs are black, with the femora entirely red, 
the hinder pair being more pitchy on the upper part. 
Grenus—TREMEX (Jurine) XYLOTERUS.  Hartig!. 
TREMEX PANDORA. 
Puate XXI, Fic. 9. 
Niger, rugoso-punctatus : capite nitido, antennis longitudine thoracis 14-articulatis ; abdomine purpureo vix 
tincto subnitido, crebre punctato, seemento ultimo obconico lateribus serrulatis, apice in spinam brevem tenuem 
producto; pedibus nigris, posticis compressis; alis fuscis, pone medium presertim versus stigma obscurioribus, 
cellulis, ante medium alarum subflavescentibus, vena cellulam basalem subcostalem postice claudenti ramulum 
nullum, versus apicem, retrorsum emittente ; mandibulis palpisque nigvris. 
Long. corp. lin. 13; expans. alar. antic. lin. 20. 
Habitat ; India Orientalis. In Mus. Hopeiano Oxoniz (olim nostr.) 
TREMEX MAURUS. 
Puate XXI, Fic. 3. 
Piceo-niger, rugoso-punctatus: abdomine levi depresso crebre et minute punctato ; antennis nigris 15-arti- 
culatis, longitudine thoracem squantibus, articulis duobus apicalibus rufescentibus; segmento ultimo thoracis 
et tribus basalibus abdominalibus utrinque ad basin fulvo maculatis ; pedibus piceis, tibils 4 posticis tarsorumque 
articulo lmo, ad basin fulvo-notatis ; capite infra pone oculos lateribusque mesosterni obscure testaceis, segmentis 
ventralibus abdominis obscure rufis; alis fuscis, cellula 1ma elongata marginali et vena mediana e basi ad 
‘ Van Heyden (Berlin Ent. Zeitschr. 1868, p. 227) has changed the name of ‘ Xyloterus, proposed by Hartig in 1837 
(but already preoccupied for a genus of Bostrichide by Erichson in 1836), to that of Xylecematium, including in the genus 
X. magus, fuscicornis Fabr. and Columba Fabr.=Pennsylvanica De Geer. Both are, however, synonymous with Z’remex 
Jurine. Norton (‘Trans. Amer. Ent. Soc. ii. p. 366), in a memoir on the North American species of Oryssus, Xiphydria, 
Urocerus (=Sirex) and Tremex, has separated Zremex Cubensis and latitarsis as a subgenus named Teredon, the antenne 
being 5- or 6-jointed, and the hind tarsi dilated. 
