320 roinnciD.T.. 



Kdj to iJie tSpecles. 



^ ^. 



a. Thorax Avitli luesonotum remarkably l<>n^:. 



stroiijL'ly constricted, cyliiulrical /'. »ir/rniot/asfe>-. p. 327. 



b. Thorax with mePonotuiu shorter, not nr 



only slightly constricted, not cylindrical. 

 a'. Scajic of aulenn.'e remarkably long, ex- 

 tendinrr beyond top of head by more than 

 half its length. 

 0-. Thorax not constricted at the meso- 



metanotal snture /'. li'/if/kor/ii". p. •j2Ci. 



b-. Thorax distinctly constricted at tlif 

 meso-metanotal snture. 

 a\ Head distinctly broader posteriorly 



than in front 1'. vaorojii. p. .331. 



//'. Head as broad in front as posteriorly. P. Ih-muna, p. 331. 

 h' . Scape of antennai extending beyond to]) 

 of head by less than half its length. 

 «-. Head oval, narrowed posteriorly. 



Length under 2 mm 7'. Im/lovi, p. 32^. 



h'-. Head more or less quadrangular, broad 

 posteriorly. Length 2 mm. 

 a^. Head highly polished, smooth and 

 shining, not pilose ; only a few 

 scattered hairs on clypeus and man- 

 dibles 1'. h(>if/alciisi\'<. p. 328. 



P. Head net polished, only slightly 

 shining, pilose or pubescent. 

 «'. Head above antennae with fairly 

 abundant erect hairs. 

 a''. Clypeus A"ery convex, rounded, 



about as broad as long P. iiKlUa. ]). 32S<. 



J'. Clypeus less convex, transverse, 



twice as broad as long P. yerhnn/i, p. 329. 



&■*. Head above base of antennse 

 without erect hairs; only a fine 

 but very distinct pubescence .... P. ascta *. p. 331. 



371. Prenolepis lougicornis. Latr. (Formica). ///>/. Xat. Fovrm. 

 1802, p. 113, >?: Ford. Jour. Bomh. N. H. Soc. viii (1894), 

 pp. 400 Sc 407, ^ cT . 



$ . Dull coppery brown, mandibles, antennae and K-gfi pale 

 whitish brown, the articulations of the legs and of the segments 

 of the abdomen still paler ; head, thorax and abdomen with fairly 

 abundant, long, erecl, somewhat coarse hairs. Head oval, as 

 broad in front as posteriorly, vertex rounded, not trausverse, 

 sides of the head straight ; eyes very large and prominent : 

 mandibles small and weak, the masticatory uiai-gin dentate with 

 5 or 6 teeth ; clypeus rounded, prominently convex : antennae 

 filiform, extremely long. Thorax elongate, rounded above, the 

 sutures distinct ; viewed from the side the thorax is lightly 



* P. .wii/thicKi. p. 330. is omitted from the ]<c\. tlic ^ being unknown. 



