Species  Myrmarachne magna S.SAITO, 1933
(from  Saburo SAITO,1933. Notes on the Spiders from Formosa. Nat. Hist. Soc., 13:32-60+pl.3)

 The original description of S.SAITO is as follows.

10. Mrrmarachne magnus n.sp.
Jap. Name, Oo-arigumo
Pl.III, Fig. 27 a-g.

 Male. cephalothorax deep blackish brown, covered with fine, white hairs, and a few long, fine prominent ones at the caput; narrow and elongate in shape, divided into two well-marked parts by a deep transverse constriction.
 Eye space forma a quadrangle, whose length and breadth are equal; eyes differing greatly in size arranged in three rows; four anterior eyes almost in contact with each other and the central eyes the largest of the eight with a diameter twice that of the laterals which is the same as that of the one in the third row; the eyes of the second row being smallest, situated closer to the anterior row than to the third row.
 Legs deep blackish brown; coxae, trochanters, patellae and the ends of tibiae of the first legs, the tibiae metatarsi, tarsi of the second and third legs and the trochanters of the fourth legs dull brown; the fist leg furbished with six strong spines.
 Palpus short, deep brown with thick, black hairs; its structure simple, possessing a process at the termination of tibia.
 Maxillae long, strong, narrowest just above the insertion of the palpi, much broader at the top, black in colour.
 Sternum dull brown.
 Chelicerae deep brown, strong, long and the inner-side furnished with the eight teeth.
 Abdomen deep blackish brown, densely covered with fine white hairs.
 The measurement are as follows (in centimeters) :-- total length, 1.00;
 Cephalothorax, 0.40; abdomenm 0.30; chelicerae, 0.40; leg I, 1.20, leg II, 0.80, Leg III, 0.80, leg IV, 1.10.
 Locality: Taihoku (R.TAKAHASHI), October 24, 1927.
 Remarks: This species differs from the other species of Myrmarachne in having six spines on the tibia of the first leg and especially in the great body length.
 (IKEDA's Comments; The SAITO's figures of this species are sufficient for the identification.) 


        Species. Myrmarachne gigantean ZABKA, 1985.
(from MAREK ZABKA, 1985. Systematic and zoologeographic study on the family Salticidae (Araneae) from Viet-Nam. Ann. Zoologici, 39(11):197-485.)

 The original description of ZABKA is as follows.
 
      Myrmarachne gigantea sp.n.

 Material; 1 male holotype - Thanh Ha , prov. Hoa Binh, 14 VI 1966, 1 female allotype, 1 male paratype - Cue Phuong. Prov. Ninh Binh, tropical rain forest, calcareous rocks, 9 VI 1966, BP, IZPAN. 1 male paratype - Cue Phuong, prov. Ninh Binh, beaten from bushes in the forest, 6 V 1966, T, HNHM.

 Male(holotype). Cephalothorax tall, with a median constriction, dark orange.
 Eye field slightly darker, surroundings of eyes black-brown. Anterior part with fine grey setae, posteriorly and near eyes tufts of white setae.
 Length of cephalothorax 3.10, length of eye field 1.20, width of eye field I 2.15, width of eye field III 1.95. 
 Abdomen oval, with vast brown-grey scutum with an indistinct margin.
 Surface of scutum coverd with fine grey setae.
 Length of abdomen 3.05. Spinnerets grey.
 Clypeus dark orange with numerous yellow-grey hairs.
 Chelicerae (Fig.322) dark orange, thick long, with characteristic large teeth near the base of the claw. On both edges there are also smaller teeth. 
 Maxillae and labium grey-orange, sternum yellow, venter grey, towards lateral surfaces lighter longitudinal streaks. 
 Palpal organ (Figs.318-321) big, with an oval bulbus and embolus forming a double loop. Tibial apophysis slightly hooked laterally. On the lateral surface long dense bristles, two short spines in the distal part of cymbium. 
 Legs very long and delicate. Leg I grey-orange, other turning grey. All covered with small sparse hairs and light brown spines.
 
 Female (allotype) (Fig.325). Cephalothorax with a strong median constriction, slender, brown, surroundings of eyes darker. On the whole surface white and grey hairs.
 Length of cephalothorax 3.01, length of eye field 1.01, width of eye field I 1.25, width of eye field III 1.35. 
 Abdomen without a scutum, grey, in the median part a broad lighter belt. Anteriorly two small apodemes. On the whole surface light grey spots.
 Length of abdomen 3.10. Spinnerets yellowish grey. Pedicel (Fig.326) of a characteristic shape.
 Clypeus light brown with grey and brown hairs.
 Chelicerae (Fig.327) thick, orange brown.
 Pedipalps brown, maxillae and labium exceptionally long, light brown with orange apices.
 Sternum light orange, venter medially light grey, towards lateral surfaces darker with longitudinal light streaks. 
 Epigyne (Figs.323, 324) with a pocket in the median part. Internal structures simple. In their proximal part membraneous, barely visible canals, in the distal part accessory glands.
 Three proximal segments of legs I white grey.
 Legs II shorter, coxae and trochanters grey-brown, femora white-grey, distally darker. Other segments yellow-orange, laterally darker.
 Leg III grey-brown, distal part of metatarsus and tarsus yellow-orange.
 Trochanters and proximal parts of patellae of legs IV white-grey, remaining part grey-brown.

 Specimens of both sexes similar in body form and coloration.
 The structure of copulatory organs indicates a relationship between the species and representatives of groups "formicaria" and "volatilis" (WANLESS, 1978a).
 M.gigantean has however its own complex of distinguishing characters:
    big body size and characteristic body form,
    strong and thick chelicerae,
    palps of males with a brush of dense bristles and two spines at the apical part of ctmbium,
    structure of pedicel in females,
    simple in structure, much elongated internal canals of epigyne.