NO. 1571. DRAQONFLTES OF BURMA AND SIAM— WILLIAMSON. 



289 



bifid tubercle. In rohustus De Selys, from Thibet, the male had the 

 appendages destroyed, while the female is not known. In alhardse 

 De Selys, from Sumatra, the outer branch of the superior appendage 

 of the male is slightly shorter than the inner ; branches of inferior 

 appendage straight; a small tubercle at either end of the occiput in 

 the female. In parallelogramma Burmeister, from Java and Sumatra, 

 .the outer branch of the superior appendage of the male is slightly 

 shorter than the inner; branches of inferior appendage straight; rear 

 of occiput of female slightly elevated. In montanus De Selys, from 

 Assaui, the outer branch of the superior appendage of the male is 

 much shorter than inner branch; branches of inferior appendage 

 straight; rear of occiput of female elevated and conical. In decem- 

 lineatus De Selys, from Sumatra and Borneo, the outer branch of 



Fig. If).— Macrogompiius quadratus from Big Tambelan Island, China Sea. A, lateral, and 



B, dorsal views of male abdominal appendages. 9 AND lO, abdominal segments 9 AND 10. 

 THE short hairs PRESENT ON THE APPENDAGES ARE NOT SHOWN IN THE FIGURES. 



the superior appendage of the male is much shorter than the inner; 

 branches of inferior appendage straight; female not known. 

 The color differences may be tabulated as follows: 



1. Lips and face black robustus 



Lips and face black, varied with yeWow . .annu hit ics, parallelo<p'amma, decemlineatus 



Upper lip and face brown, varied with yellowish alhardx 



Li})s and face yellow, varied with black inontaims 



2. Sides of thorax black, with 2 isolated oval yellow bands. 



robust as, annulatus, albardx 



Sides of thorax black, with 3 equal isolated yellow stripes decemlineatus 



Sides of thorax yellow, with approximated stripes on the lateral sutures and a third 



stripe at the posterior edge parallelogramma 



Sides of thorax yellow, with black stripes on the lateral sutures montanus 



3. Legs black robustus 



Legs black, first femora pale spotted heweoXh.. .annulatus, montanus, decemlineatus 



Legs black, femora shading into reddish albardx 



Legs black, femora yellow parallelogramma 



Proc. N. M. vol. xxxiii— 07 19 



