4S0 Mr. E. E. Turner on some 



instead of two, as in the type. Colonel Nurse remarks : 

 *' It should tlierefore stand as Myzine alhomaculata, Cam., 

 and the genus Pcecilotiphia , founded on an abnormal specimen, 

 must be suppressed." The same insect has been described 

 by Nurse as the male of Myzine apimacula, Cam., which ha^ 

 the neuration of Plesia, and although this association of the 

 sexes is not quite certain, it does not seem improbable ; 

 though the male differs from other oriental species of Plesia 

 in the short petiole and the deep slit in the apical dorsal 

 segment. The female apimacula differs from most species of 

 Plesia in the very feeble development of the sculpture of the 

 apical dorsal segment, agreeing in- this with the peculiar 

 female, P. tricolor, Sm. The latter species may prove to be 

 the female of Myzine dimidiaticomis, Bingh., wliich agrees 

 with Plesia in the almost complete absence of the slit for the 

 reception of the aculeus on the seventh dorsal segment, 

 which is present in all true J/y^e'/^e known tome. Din.idiati- 

 cornis agrees with tricolor in the length of the second cubital 

 cell, the elongate head, and the colour of the antennae. 

 Specimens of P. tricolor from A<sam have the head distinctly 

 longer in proportion than the tyj)ical Borneo form. I fully 

 agree with Nurse in sinking Pcecilotiphia. 



Plesia 7iU7'seif sp. n. 



cJ. Clypeus slightly produced and very narrowly truncate 

 at the apex, almost smooth, thinlj^ covered with short white 

 pubescence. Antennce stout, as long as the head, thorax, 

 and median segment combined; the scape closely and rather 

 finely punctured, shorter than the third joint of the flagellum. 

 Interantennal prominence bilobed, covering the base of the 

 scape. Head closely and deeply punctured, more shallowly 

 on the vertex than on the front, with sparse white pubescence, 

 the eyes widely but not deeply emarginate. Thorax rather 

 sparsely punctured : the pronotum nearly as long as the 

 mesonotum, less than twice as broad as the length in the 

 middle, narrower than the head, the anterior margin straight 

 with slightly prominent angles. Median segment punctured- 

 rugose, rounded, much longer than the breadth at the base. 

 Abdomen elongate, slender, petiolate, the first segment as 

 long as the second and third combined, the basal third of the 

 segment very narrow and flattened, the apical two-thirds 

 nodose, constricted at the extreme apex ; all the segments 

 shining and very sparsely punctured , the seventh dorsal 

 segment not emarginate at the apex. 



Black; the mandibles (except at the extreme apex), the 



