PLA-TTXHYREA. DIACAMMA. 75 



Length, § 6*5-7 mm. 



Hah. India, recorded so far only from the Punjab (Sarje) and 

 from Kauara ( Wroiighton). 



92. Platythyrea wrOUgbtoni, Ford, Jour. Bomb. N. H. Soc. xiii 



(1900), pp. 314 & 315, 9 . 



g . Black, with a silky pruinosity, opaque ; the mandibles, an- 

 tennae, legs and apex of abdomen brownish yellow ; pilo-iity reduced 

 to a few short e?'ect yello\\- hairs at the apex of the abdomen ; 

 pubescence very short, fine and silky, giving less of a hoary-grey 

 pruinose appearance than in P. sagei. Head slightly emargi- 

 nate ])osteriorly, not so convex in front as in P. sagei ; anteunal 

 carina laminate but rather narrow. Thorax as described in the 

 characters for the genus, but the metanotum emarginate rather 

 than bidentate posteriorly, the basal portion of the metanotum 

 margined at apex, the apical portion more or less concave ; legs 

 short and stout. Node of the pedicel cylindrical, truncate anteriorly 

 and posteriorly, about twice as long as broad, the apex posteriorly 

 above medially pinched up into an obtuse point ; abdomen rather 

 massive. 



Length., ^ 3-5 mm. 



Hah. Travancore (Ferguson); Mysore (Wronghton); Madras 

 (Eothney), 



93. Platythyrea victoriae, Fore/, Jour. Bomb. N. H. Soc xiii (1900), 



pp. 315 & 316, 9 . 



5 . Yery similar to F. wroughtoni, Forel ; in fact a barely 

 separable race. Larger, with comparatively shorter antennae, the 

 antenual carime distinctly more swollen and broader. Thorax 

 with the metanotum as in P. ivronghtonl, but not so deeply emar- 

 ginate posteriorly. Node of the pedicel comparatively shorter, 

 about once and a half (twice in P. turoughfoni) as long as broad. 



Length, ^ 4*5 mm. 



Hah. Eecorded from Bengal {liothneg), Western India, Mysore 

 ( Wroughton). 



Genus DIACAMMA. 



Formica, pt., Fabr. Si/st. Eat. (1775), p. 393, § . 



Ponera, pt., Le Guill. Ann. Soc. Ent. Fr. x (1841), p. 318, ^ . 



Uiacamma, Mayr, Verh. zool.-bot. Ges. Wien, xii (1862), p. 718, § . 



Type, D. rugosum, Le Gruillou, from Borneo. 



Range. Indo-Malayan and Australian regions. 



^ . Head oval ; mandibles comparatively large, broad, triangular, 

 the masticatory margin strongly toothed ; clypeus extended pos- 

 teriorly into a point between the anteunal carinoe ; these latter 

 very close together, anteriorly laminate ; antennae 12-jointed, 



