i6 Univcrsiiy of Micliigaji 



against my plan is the unmodified character of the prothorax, 

 and the fact that such a couphng involves a greater departure 

 from the usual gomphine method than Dr. \\'alker's i)lan 

 necessitates. 



One female specimen has the head of a bee attached to the 

 left hind tibia. The apex of the tibia is broken off, the mandi- 

 bles of the bee gripping the tibia firmly near its base. Through 

 the kindness of Air. Currie this specimen was submitted to 

 ]\Ir. J. C. Crawford of the United States National [Museum 

 who reports that "the head is that of one of the stingless 

 honeybees, Trigona sp. These bees, of which there are many 

 species in the tropics, are social in their habits, and build 

 nests, combs, etc., and store honey. It is possible that the 

 dragonfly was attacked by the bee when in the vicinity of its 

 nest, but more probably the dragonfly captured the bee which 

 seized its captor by the leg before being dispatched." 



Remarks: Two species of Agriogomphus, based on female 

 specimens only, are known : sylvicola de Selys, and infaiis Ris. 

 The male figured by Xeedham, referred to in a footnote above, 

 was never named and only the wings are preserved. It is 

 fortunate, in view of the fact that colors and even color pat- 

 terns become obscure in dried specimens of these gomphines, 

 and that only females have been described, that good vena- 

 tional characters are available for their recognition. Hamatits 

 is separated at once from sylvicola by the short stigma and the 

 well-developed four-sided triangles. It is also a smaller species 

 than sylficola. In the hind wing the number of cells posterior 

 to Cu. which do not reach the posterior margin is one. rarely 

 two, in the male, and two or three in the female of liaiuatiis; 

 in Needham's figure (male) there are four, and in Ris's figure 

 (female) there are six. The triangles of hamatus are more 



