HECAERGE. 
41 
The male is smaller, slenderer, and more distinctly marked than the female. The palpi 
are provided with strong spines, and the radial joint projects three apophyses from its 
extremity; one, on the outer side, is terminated by several points; a strong, pointed one is 
situated underneath; and intermediate between these two, towards the outer side, there is 
another, which is obtuse, and is supplied with long hairs forming a dense tuft; the digital 
joint is of an oblong-oval form, convex and hairy externally, compact at the extremity, and 
concave within, at the base ; this concavity comprises the palpal organs, which are moderately 
developed, complicated in structure, with a slender, curved, pointed spine at their extremity, 
directed from the inner to the outer side, and consist of dark, reddish-brown, and yellowish 
parts intermixed. 
In the fens of Cambridgeshire this fine spider is of frequent occurrence. Like Lycosa 
piratica , it descends spontaneously beneath the surface of water, the period of time during 
which it can respire when immersed depending upon the supply of air enveloping its body. 
In May the female deposits several hundred eggs in a globular cocoon of brown silk of a 
compact texture, measuring three fifths of an inch in diameter, which she carries under the 
sternum, supporting it there by the instrumentality of the falces and palpi. 
The Dolomed.es limbatus and Dolomedes marginatus of M. Hahn are immature individuals 
of this species. 
Genus HECAERGE ( Blac/cwall). 
Eyes unequal in size, disposed in two transverse rows on the anterior part of the cephalo- 
thorax; four constituting the anterior row, which is slightly curved backwards, are adjacent 
and minute: the posterior row is greatly curved, with its convexity directed forwards; 
it comprises the other four eyes, which are large and separated by moderately wide 
intervals. 
Maxillae short, strong, convex on the under side, enlarged at the base, where the palpi 
are inserted, rounded at the extremity, and inclined towards the lip. 
Lip small, triangular, and truncated at the apex. 
Legs robust; the fourth pair is the longest, then the first, the third pair being the 
shortest. 
Hecaerge spinimana. PI. Ill, fig. 21. 
Hecaerge spinimana, Blaclcw., Annals and Mag. of Nat. Hist., second series, vol. vii, 
p. 399. 
— maculata, Blackw., Lond. and Edinb. Phil. Mag., third series, vol. iii, p. 193. 
— — Blackw., Research, in Zool., p. 413, pi. 3, fig. 8. 
Lyccena spinimana, Sund., Yet. Acad. Handl., 1832, p. 266. 
Lycodia — Sund., Consp. Arachn., p. 22. 
Dolomedes lyceena, Walck., Hist. Nat. des Insect. Apt., tom. i, p. 348. 
Zora spinimana, Koch, Die Arachn., Band xiv, p. 102, tab. 481, figs. 1343 and 1344. 
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