18 Mr. W. F. Kirby on 



exhibit no great amount of variation, and I am inclined to 

 think that many neuropterists (myself included) have been 

 too hasty in putting together insects which appear to be con- 

 stant in their own localities, as mere forms of N. stigmatizans 

 and Jluctuans, Fabr. 



Trithemis bipunctata. 



I Libellula {Dijrtax) bipunctata, Brauer, Reise d. Novara, Neur. p. 86 

 (1866). 



Two specimens received from Mr. Turner. There is also 

 a pruinose blue male, which probably belongs to this species, 

 if it ever assumes that colour. 



Trithemis rubra. 

 Trithemis rubra, Kirby, Trans. Zool. Soc. Lend. xii. p. 328 (1889). 

 Two specimens in Mr. Turner's collection. 



Crocothemis servilia. 



Libellula servilia, Drury, 111. Ex. Ent. i. pi. xlvii. fig. 6 (1773). 



A single specimen of this common East-Indian and Aus- 

 tralian species. 



Brachydiplax australis, sp. n. 



Long. corp. 27 millim. ; exp. al. 47 millim. ; long. pter. 

 2 millim. 



Male. — Head black behind, with two confluent yellow spots 

 behind what Charpentier calls the " cuneus," the small space 

 filling up the space between the eyes behind ; upper part of 

 the head metallic green, except at the sides ; lower part 

 yellow ; mandibles (except at base), lower edge of the rhina- 

 rium (rising into a spot in the middle), and suture of the 

 labium black. Thorax black and yellow, as is also the base 

 of the abdomen, which is yellow beneath and blue above 

 beyond the base of the third segment ; thorax mostly blackish 

 above, beneath the blue dusting (in young specimens it would 

 probably be aeneous) ; pleura yellow, with four black, separate, 

 slightly aeneous stripes ; legs black ; pectus mostly black and 

 shining, slightly aeneous, and intersected by yellowish sutures ; 

 anal appendages as long as the last two segments, slightly 

 hairy, not dentated. 



Wings clear hyaline, with black nervures ; fore wings with 

 six antenodal and five postnodal cross-nervures, the first two 

 postnodals not continuous ; pterostigma dull yellow, between 



