60 
PROCEEDINGS OF SOCIETIES. 
U, abdomen; V, belly; Y, hypopygium, or vagina; Z, terebra; e, a joint; 
a, front; z , back ; 6 , base ; o, tip ; /, upper; < 7 , under; p, side face ; 0 , larva ; 
0 , pupa. 
Ord.— COLEOPTERA. 
Fam.— HYDROPHILIDiE. 
Ochthebius rufomarginatus, pi. 3 , fig. 1 . 
Erichson. K. M. Br. i. 199. 2 ;—Bohem. Act. Holm. X. 46. 3 (1854). 
On the silt of the Castlemaine river along with O. bicolor, July. 
Cercyon depressum, pi. 3, fig. 2 . 
Stephens’s Mand. ii. 138. 5;—Manual 93. 721 ;— C. dorsostriatum. Bohem. Act. 
Holm. X. 54. 2 . 
Under fuci on sandy coasts with C. littorale, but less abundant. 
Ord.— HYMENOPTERA. 
Fam.—TENTHREDINID.E. 
Gen.— heptamelus, Hal.—Melicerta* Steph. Mand. vii. 94, xxvi. 
Antennae 7-articulatse, filiformes. 
Alae anticae areolis radialibus 2 ; cubitalibus 3, Ima. et 2da. venulam quaque 
excipiente; brachialibus conterminis ; analis venula obliqua ; f posticae areolis 
discalibus 2 conterminis. 
Heptamelus ochroleucus, pi. 2 , fig. 1 . 
Melicerta id. Steph. Mand. vii. 95. 
Long 2^-, Exp. 4£ lines. Nearly linear, with head as broad as thorax, and 
depressed abdomen. Head shining black, finely stippled, and with pale 
pubescence; vertex with a longitudinal impression behind each lateral ocellus; 
epistoma with the edge nearly straight. Antennae a little longer than the thorax, 
7-jointed, pubescent, the first two joints yellowish, shorter, but scarcely thicker 
than the rest, 3d twice as long as 2d, the rest longer by a half only, the last not 
elongated. Mandibles rufescent, dusky at the tip ; other parts of the mouth pale 
yellow; labrum entire; palpi long and slender, probably 6 and 4-jointed, 
respectively. Thorax shining, very faintly stippled and pubescent, rufotestaceous, 
pleurae under the wings and metathorax black; sutures of mesonotum joined some 
way before the scutellum. Wings hyaline, with the root and tegulae whitish, the 
costal vein and stigma yellow, the other veins light brown. Stigma broad oval. 
Kadial areolets 2; cubital 3, 1st elongated, receiving the 1st discal veinlet about 
the middle, 2 d oblong-hexagonal, receiving the 2 d discal veinlet in the middle, and 
the radial veinlet opposite to it ; pobrachial areolet not extending beyond the 
praebrachial, nor longer than the posterior discal; the oblique veinlet of the anal 
area arising as a continuation of pobrachial veinlet. Lower wings, with the two 
brachial areolets, of equal length, the anal one-third shorter, the two discal 
conterminous. Legs of moderate length, rather slender, finely pubescent, pale 
yellowish; spurs of tibise, pale, slender, subulate. Tarsi simple; ungues be¬ 
neath acutely toothed in the middle. Abdomen with the first segment blackish ; 
the following ones above with a transverse, dusky spot, attenuated at the sides, and 
interrupted by a pale dot in the middle; sometimes these spots are connected into a 
broad, jagged, dorsal band ; the hindmost segments and the underside are imma¬ 
culate. 
This species seems to connect Blasticotoma filiceti , Klug. (pi. 2, fig. 2J), and 
the group with 9-jointed filiform antennae ( Emphyti , &c.). The number of areolets, 
the broad stigma, and origin of the radial veinlet, agree in both genera. Peculiar 
to Heptamelus is the short pobrachial areolet, which, in the Tenthredinidce , usually 
extends a good deal beyond the end of the praebrachial. In Plagiocera , also, they 
are conterminous ;§ but the pobrachial is twice as long as the posterior discal; and 
* Plurieslect. 
t Copied from Klug. 
f “ Area lanceolata nervo obliquo,” Hartig. 
§ Klug. jb. ins. pi. 2, fig. 5. 
