HYMENOPTERA. 75 



Genus 6. DOLICHODERUS. 



Formica, pt., Fabr. Syst. Ent. 394 (1804). 

 Dolichoderus, Lund. Ann. des Sc. Nat. xxiii. (1831). 



1. DOLICHODERUS ATTELABOIDES. PI. V. figs. 1, 2, 3. B.M. 



Formica attelahoides, Fabr. Syst. Ent. 394. 19 g ; Ent. Syst. ii. 

 360.45; Syst. Piez. 410. 62. 



Oliv. Encycl. Meth. vi. 498. 40. 



Latr. Hist. Nat. Fourm. 288. 



St.Fary. Hym. i. 222. 31. 

 Dolichoderus attelaboides, Lund. Ann. des Sc. Nat. xxiii. 130. 



Hah. Brazil (Para; Santarem; Tejuca; Rio Janeiro). 



All the sexes of this species have been received from Mr. Bates : 

 figures are given of the male and female ; the latter only differs 

 from the worker in having the thorax more robust, and in being 

 winged : the male is four lines and a half long, black, with the 

 abdomen and legs smooth and shining, the head and thorax ru- 

 gose as in the worker ; the tarsi, articulations of the legs and 

 apex of the antennae testaceous ; the head is triangular, prolonged 

 behind into a neck, with the eyes larger and more prominent 

 than in the other sexes ; the abdomen is elongate- ovate. 



2. DOLICHODERUS DECOLLATUS. B.M. 



Female. Length 6 lines. Head, antennae, thorax, legs, and 

 scale of the petiole, ferruginous ; abdomen ovate, black, covered 

 with a fine silky pile, the fourth and following segments ferrugi- 

 nous. Head elongate-ovate, coarsely rugose; the mandibles 

 smooth and shining, with a few scattered punctures, the head 

 not prolonged into a neck. Thorax rugose, the metathorax with 

 two stout curved spines; the wings flavo- hyaline, the nervures 

 pale rufo-testaceous. 



Hab. Demerara. (Coll. F. Smith.) 



This species is distinguished from attelaboides by not having 

 the head prolonged into a neck ; it is also a broader and more 

 robust insect ; the metathorax is rugose above, not transversely 

 striated as in the other species. 



The worker of this species is in the British Museum ; it is also 

 from Demerara ; it differs from the worker of attelaboides in not 

 having the head prolonged into a neck ; it is, however, propor- 

 tionately larger than in that species. 



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