232 aegtopidtE. 



b 2 . Median spines not clavate. 



a 3 . Median spines less than twice the 

 width of the abdomen. 

 a 4 . Median spine equalling width of 



abdomen G. sororna, p. 233. 



b*. Median spine nearly twice the 



width of the abdomen G. dalyi, p. 232. 



b 3 . Median spine slender, arcuate, more 

 than twice as long as width of 



abdomen G. arcuata, p. 232. 



b. A ventral tubercle in front of spinners on 

 abdomen. 

 a 5 . Anterior and median spines subequal, in 



contact except .at the extremities G. yeminata, p. 233. 



b 5 . Anterior and median spines widely sepa- 

 rated. 

 a 6 . Summit of head elevated into a conical 



eminence ; spines short G. brevispina, p. 235. 



b n . Summit of head not elevated into a 

 conical process. 

 a 7 . Lateral and to a lesser extent posterior 

 spines very broad at base, abruptly 



narrowed at apex G. unyuifera, p. 234. 



b 1 . Lateral and posterior spines mostly 

 evenly acuminate. 

 a 8 . Abdomen only about one-fourth 

 wider than long, not laterally 



narrowed G. leucomelcena, p. 235. 



b s . Abdomen twice as wide as long, \ G.frontata and 



laterally narrowed | G. diadesmia, p. 234. 



256. Gasteracantha arcuata. Fabr. Bat. Syst. ii, p. 425, 1793 



(Aranea) ; Thorell,Ann. Mus. Genova, xxv, p. 223, 1887 (Plectaua) 

 (synonymy). 



Colour : carapace, legs, &c. blackish, femora rather paler ; abdo- 

 men yellow above, with marginal black antero-lateral band, black 

 below and covered with yellow spots. Abdomen with anterior 

 and posterior spines minute ; median spines very long, slender, 

 and arcuate, exceeding twice the width of the abdomen in the 

 adult. 



Measurements in mm. — Width of abdomen at base of anterior 

 spines 8-8 mm., length 6*5, length of median spine 20. 



Loc. Burma: Tharrawaddy (Oates), Shwegoo {Fea). Indo- 

 Malaysia. 



257. Gasteracantha dalyi, sp. n. 



Allied to the preceding, but with the abdomen not margined 

 with black above, the anterior and posterior spines larger and the 

 median spine much shorter, less arcuate, and considerably less than 

 twice as long as the width of the abdomen. 



Width of abdomen 8*8 mm., length of median spine 15. 



Loc. 8. India : Yercaud in Shevaroy Hills {Daly). 



