542 ODONATA, ifcc, FROM LOKD HOWE AND NORFOLK ISLANDS, 



crossvehts in the t'orewiiig, 7 in each series; in tlie hindwing, 3-5 

 ill the inner, 6 in the outer series. Number of cells below M' 

 from tlie median loop to the wing-border in the foiewing, eight. 



Head brownish, moderately large; antennce pale brownish. 



Thorax: prothorax short, rather wide posteriorly, brown. 

 Pterothorax brown. Legs pale brownish. 



Abdomen dark brown, [much shrunken]. 



Type in Coll. South Australian Museum. Cotype in Coll. 

 Tillyard. 



Two specimens from Norfolk Island. 



N.B. — In all the above descriptions of Chri/nojm^ n.spp., it 

 should be borne in mind that the bodj^ is much shrunken, and 

 the original colouration more or less lost. Probably there is a 

 considerable amount of gieen or yellow on the thorax and abdo- 

 men of most of the species. For determination of the species, it 

 is best to rely upon the wing-venational characters. In nearly 

 all cases, the antenn£e are more or less broken, so that they could 

 not be used very well in the specific determinations. 



Family NYMPHID^. 

 14. Myiodactylus howensis, n sp. (Text-figs. 9- 10). 



Total length, 15 mm.; forewhig, 22 mm. 



Wings rather narrow, well pointed, the veins very pale 

 yellowish-green, touched here and there with blackish on some 

 of the junctions and cross-veins of the forewings. Ptt-rostigma 

 1 mm., trapezoidal, rose-pink. Rs with 9 branches in forewing, 

 8 in hind. Central "disc" not so sharply marked off as usual in 

 this genus. Costal area of forewing only moderately widened, 

 but the costal veinlets united for half the length of the wing 

 from the base, by a series of cross veins; between these and the 

 costal margin are five or six more cross-veins, forming a shorter 

 anterior series. 



Head wide, dull orange; anteniuH thick, uniform, 8 mm., 

 orange. 



Thorax: prothorax narrowed anteriorly, orange-brown, with 

 darker markings dorsally. Pterothorax pale orange. Legs pale 

 yellowish-brown. 



