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VOL. XXXIII. 



Borneo, and possibly Sumatra, the yellow dorsal thoracic spots do 

 not extend laterally beyond the humeral suture, and the auricles of 

 the male are entirely black. In thoracicus McLachlan, from the 

 Malay Peninsula and Sumatra, the thoracic spots extend laterally 



Fig. 14.— Wings of male Macrogomphus quai>i;atus from Big Tambelan Island, China Sea. 



onto the mesepimeron, and the auricles are largely yellowish. In 

 abnormis De Selys, probably from Borneo, the thoracic spots extend 

 entirely across the sides of the thorax. 



Parallelogramma group. — Dorsum of thorax black, with yellow 

 dorsal stripes. The following notes are from De Selys' synopsis of 

 the species in Quatrieme Addition au Synopsis des Gomphines. In 



Fig. 15.— Wings of female species of Macrogomphus from Siam. 



annulatus De Selys, from India, Tonkin, and Anam, the outer and 

 inner branches of the superior appendage of male are about equal 

 in length, with a short inferior tooth; inferior appendage seen in pro- 

 file with a double curve; rear of occiput of female with a median 



