MYOPOPOXE. MTSTRIUM. 35 



apex of the femora, the tibiae and tarsi of the legs, and the apical 

 segment of the abdomen a lighter yellowish brown. Pilosity and 

 pubescence as in M. castwiea, but of a darker colour. Head as in 

 that species and with similar sculpture, but the punctures on the 

 mandibles run into longitudinal stria3, the apex of the mandible is 

 more oblique, and the apical tooth is long, acute, and slightly 

 curved. Thorax and abdomen as in $ of J/. castanea, but highly 

 p/olished and smooth, bearing only a few scattered punctures. 

 Wings fusco-hyaline, costal nervure and stigma black. 



Length, $ 16 mm. (including mandibles) ; mandibles 2-5 mm. 



Hob. Sikhim. 



I took this species at light at 7000 feet, but did not get the . 



Genus MYSTRIUM. 

 Mystrium, Roger, Berl. ent. Zeit. vi (1862), p. 24-5, pi. 1, fig. 15. 



Type, M. mysticum, Roger, from Madagascar. 



Range. Ethiopian and Indo-Malavan regions. 



$ . Head much broader than the thorax, square, depressed, very 

 slightly convex above, posteriorly emarginate, the anterior lateral 

 angles produced into acute points on the outer side of each 

 mandible, the posterior lateral angles also acute but not so 

 narrowly produced as the anterior angles ; mandibles long, linear, 

 very slightly curved, spatulate at apex, the inner margins den- 

 tate ; when closed the apices cross in front ; clypeus transverse, 

 broader in the middle than at the sides, arched anteriorly, with 

 the margin denticulate ; autennal carinse short, widely separate ; 

 antennae 12-jointed, with the flagellum slightly clavate at the 

 apex ; eyes and ocelli entirely wanting. Thorax rounded in front, 

 vertically truncate posteriorly, the pro-mesonotal suture anteriorly 

 arched, broad and distinct, the meso-metanotal suture traceable but 

 not well-marked above ; the meso- and metanotum slightly com- 

 pressed, narrower than the pronotum ; legs short and robust. 

 Pedicel one-jointed, with the node cubical, large, truncate an- 

 teriorly, posteriorly joined to the abdomen by the whole of its 

 posterior face ; abdomen oval, somewhat acutely pointed at apex, 

 the constriction between the basal two segments distinct but not 

 deep. 



$ . Closely resembles the ; larger. Head a little broader 

 than long ; eyes and ocelli present ; antennae, clypeus and 

 mandibles as in the $ . Thorax broader, deeper, more massive 

 than in the ; the pronotum and mesonotum subequal, the latter 

 posteriorly with the scutellum somewhat narrowed ; metanotum 

 short, vertically truncate posteriorly. Pedicel and abdomen more 

 massive, but similar to those in the . 



Only one species has so far been recorded from within our 

 limits. 



