hymenoptera. 81 



13. Odontomachus infandus. B.M. 



Worker. Length 6 lines. — The head and thorax ferruginous, 

 with a fine silky grey pile ; the antennae ferruginous ; the legs 

 pale testaceous, with the tarsi dusky. The mandibles serrated 

 on their inner edge, the teeth increasing in size towards the apex 

 of the jaws, which are suddenly bent at their extremity and armed 

 with three teeth, the inner one shortest ; the deep sulcations on 

 the face between the eyes, smooth and shining, the hinder 

 portion finely and obliquely striated ; the head, behind the sul- 

 cation, striated on each side obliquely fi-om the centre. The 

 prothorax with fine curved longitudinal striae, that on the meso- 

 and metathorax transverse. The node of the abdomen termi- 

 nating above in a long, slightly curved, acute spine, the base of 

 the node with a blunt tooth beneath. 



Hab. Philippine Islands. (Coll. H. Cuming.) 



Notwithstanding the great similarity of all the species of this 

 genus, and particularly between this and the O. maxillaris, the 

 great difference in the serration of the mandibles will at once 

 distinguish them. 



"C^ 



Species of Australia. 



14. Odontomachus ruficeps. B.M. 



Worker. Length B^ lines. — Head red; the thorax, legs and 

 abdomen dark rufo-fuscous. The mandibles distinctly serrated 

 on their inner edge, abruptly bent at their apex and armed with 

 two stout blunt teeth, with a smaller tooth in the middle of their 

 fork ; the head delicately striated, the strise longitudinal on the 

 prominence which extends from the insertion of the autenua; to 

 the junction of the lateral sulcations on the face ; the vertex 

 obliquely striated, as well as the anterior sulcations. Thorax 

 striated, the striation of the prothorax having a circular direc- 

 tion ; that on the meso- and metathorax transverse ; the legs 

 palest at the joints. The abdominal peduncle spined at the apex, 

 as in 0. hcematodes, and striated transversely. The abdomen 

 ovate, smooth and shining. 



Hab. Austraha, 



Genus 2. DREPANOGNATHUS. 



Harpegnathos, Jerdon, Madr.Journ. Lit. 4" Sci. 103 (1851) (nee 

 Wesm. Col. 1834) ; Ami. ^- May. Nat. Hist. 2nd ser. xiii'. 100. 



Head elongate ; eyes lateral, large, ovate and j)laced forward 

 on the head, touching the base of the mandibles ; the mandibles 

 one-third longer than the head, bent, and curving upwards ; their 



E 5 



