30 Mr. ^V. C. Crawley on 



occipital border wiilcly aiitl deeply euiar;;inatc. Anterior 

 border of" cly[)eus very fecijly convex witii the suspicion of 

 an incision in the centre. The scape fails to reach the 

 occipital border by its width. Joints 2-5 of funiculus sub- 

 equal, slightly longer than broad ; the sixth shorter, the 

 remainder lengthening and broadening, the apical longer 

 than the two preceding together. Eyes large, less than 

 their length from base of mandibles. 



Thorav flat, as broad as head, Epinotnm as in jlacus, 

 scale as m jiavus, but thinner and more pointed at apex. 



Gaster as in fiavus. 



Murray River, W. Australia (Clark). 



Two ? ? taken with Iridomyrmex innocens, For., no. 146. 



Type AV. C. C. coll. 



Comes near the race ccqualis, For., of pusillus, Mayr. 

 DiHers from the ? oi jiavus in the shape of head, node, and 

 particularly mandibles. The latter are characteristic, and 

 e\idently adapted for decapitating the host queen. Probably 

 parasitic on /. iiinuceus. 



Acuntholejns i^Stiymacrus) occidextalis, sp. n. 



$ . Length 1*9 mm. 



l.>irty yellow, sometimes almost entirely brown ; head 

 darker, legs paler, a brownish band on apical borders of 

 segments of gaster. Posterior and lateral borders of clypeus 

 lined with dark brown. 



Pilosity almost nil ; two pairs of longish hairs on clypeus 

 and a few on the apical segments of gaster. Whole body 

 with small ad])resse(l hairs. 



Head a fraction l)roader than long, narrowing slightly in 

 front of eyes, which are placed just behind the middle of 

 sides. Occipital angles rounded, the border widely concave. 

 Frontal area large, triangular, its anterior and lateral 

 borders clearly defined. jNIandibles triangular with four 

 teeth and a fifth obsolete between the second and third. 

 Clypeus bluntly carinate, the anterior border rounded and 

 having a slight flattening in the middle. Frontal carinse 

 short, slightly divergent. Scapes pass the occiput by nearly 

 one-quaiter of their length, they are incrassate towards apex. 

 First joint of funiculus twice as long as second, which is 

 liaidly longer than broad, the rest all longer than broad, the 

 apical equalling the two preceding. There is a distinct 

 thickening towards the apex. 



Pjonoium epaulate, twice as wide as long. Promcsonotal 

 suture distinct and impressed. ISIcsonotal longer than wide, 

 Mider in front. The mesonotum forms a transverse ridge, 



