4 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.66. 



a.* With blue coloring on abdomen, etc. — Continued. 



6.* Very small species (abdomen of male 19 mm., of female IS mm.; 

 hind wing of male 13 mm., of female 13.5 mm.). In the male, seg- 

 ment 8 has a dorsal band of uniform width of black, and 10 has a 

 dorsal, black mark relatively broader than in the last species ; 9 is 

 usually entirely blue, but some specimens have a diamond- 

 shaped, black mark on the dorsum of this segment also. The 

 female has the whole dorsal surface of 8 and 9 covered with a 

 broad black band, narrowing apically on 9, whilst 10 has a basal 



bilobed black mark. Postnodals 8 or 9 A. borneense Ris. 



a.^ Without any blue coloring on abdomen. 



J}} Rather large species (abdomen of male 34 mm., of female 32 mm.; 

 hind wing of male 22 mm., of female 22.5 mm.). Ground color 

 generally creamy-white; rather darker on sides of synthorax 

 and of segments 1, 2, 3 of abdomen. In the male, segments 8, 

 9, 10 are without markingsi, 2 has an isolated triangular black 

 mark on the distal half of the dorsum surrounded by a pale 

 margin ; 3 to 7 with black dorsal bands widened apically on each 

 segment, pointed ba sally in 3. The female has a longitudinal 

 black band on the dorsum of segment's 2 to 7 of the abdomen, and 

 8 has a black, dorsal mark, narrow basally, widening distally, 

 but not touching either end of the segment. Thirteen postnodals 

 on forewing. Each femur marked with black line in both 

 sexes A. olympicum Laidlaw. 



6.^ Species of moderate size (abdomen of male 28 mm., of female 29 

 mm. ; hind wing of male 18 mm., of female 19 mm.). Very fragile 

 and slender. In the adult male the ground color of the dorsum 

 of the head and thorax appears to be a dull blue with a greenish 

 tinge. In immature males, and in females this color is replaced 

 by fawn color. Antehumeral stripes not so sharply defined as in 

 other species. Ground color of abdomen white or buff-white of a 

 warmer tone on the dorsum. Segments 1 to 7 each with a longi- 

 tudinal dorsal band of metallic green. Segments 8, 9, 10 without 

 markings. In immature males and females the dorsal band is 

 present on the first and second segments and on the base of the 

 third ; it is also well developed on segments 6 and 7. In both 

 sexes the femora are without markings, but the joints of the legs, 

 and the spines, are brownish. Postnodals 10 to 12. 



A. pallidum de Selys. 

 a-.' Species which are not known to me. 



&.^ A. approximans (de Selys). 



This species has never been fully described. It is said by de 

 Selys to be related to A. liisopa in venation and by the form of 

 the anal appendages. The last 3 segments of the abdomen of the 

 type are missing. The female is unknown. Said to come from 

 the Kjasi Hills. Abdomen of male 27 mm. (approximately) ; 

 hind wing 17.5 mm. (Possibly A. Hllyardi is synonymous, but 

 the anal appendages of that species are strikingly different from 

 those of A. hisopa in appearance.) 



