138 FURTHER ILLUSTRATIONS OF 
THYNNUS (THYNNOIDES) OBSCURUS, Klug. 
(Ueber Thynnus F, p. 22, Pl. annex. fig. 4 ¢.) 
The male of this species having been described and figured by 
Dr. Klug, the opposite sex only is here represented ; both sexes 
having been forwarded to Mr. Hope by Mr. MacLeay, under the 
name of T. nasutus Me. L. 
The male is described as follows by Dr. Klug :— 
Th. fusco-niger albido villosus, pedibus brunneis. Mas. Long. lin. 10. 
Ubique dense punctatus. Clypeus porrectus dorso convexus, carinatus apice truncatus, flavo mar- 
ginatus. Mandibule flavee marginibus apiceque nigris. Antennee abdomine vix breviores. 
Prothorax apice membranaceus pallidus, tegulz apice testacee. Caput antice, gene, pectus, 
metathorax, latera abdominis dense albo villosa, Als infuscate, nervis stigmateque nigris. 
Pedes brunnei, coxis, tarsis, anticorum femoribus basi nigris ; abdominis segmentum dorsale 
ultimum dorso impressum ; spina in abdominis apice porrecta lanceolata acuta incurva, basi 
utrinque obsolete tuberculata. 
This sex, which I have received from Mr. Curtis, differs from the 
males of the other Thynnoides in not having the anterior cox 
dilated and cup-shaped. 
The female (Plate 82, fig. 2,) partakes of the obscure and seri- 
ceous appearance of the male, being black, with a slight pitchy 
tinge, the head convex and extremely delicately punctured, the 
punctation being visible only with a lens, the clypeus short and 
truncate at the tip, the mandibles reddish, with the tips black, the 
antennee pitchy, the maxillary palpi (fig. 2 a) almost obsolete, the 
labial palpi (fig. 22) longer and 3-jointed. The thorax is black 
and finely punctured, the hind margin of the prothorax membranous 
and pitchy, the legs pitchy brown and thickly setose ; the abdomen is 
large and convex, the first segment widely punctured, with a single 
carinated stria near the hinder margin, the second segment large and 
transversely marked with about seven carinated striz, the third 
segment is very finely punctured, and divided transversely into two 
parts by an impressed line; the hind part of this and the followmg 
segments clothed with very fine gray down. The anal segment 
(fig. 2c, 2 d) is deflexed, oval-truncate, and longitudinally striated, 
with the aculeus exserted and directed downwards; the basal 
segment beneath is angulated. The body beneath is black, with a 
gray sericeous coating, and with the fifth segment very thickly 
punctate. The specimen of the female sent by Mr. MacLeay is 
six lines long. 
