146 On new or litth-knoinn Species of Tliynnidae. 



fides, the coxae beneath, the projection of tlie mesosternum 

 between the intermediate coxte, the truncation of the first 

 abdominal segment witli a longitulinal black mark in the 

 middle and a small black spot on each near the base of the 

 truncation, a broad band eraarginate in the middle and less 

 deeply on the sides posteriorly above the truncation and not 

 separated from it, a broad band rather narrowly interrupted 

 in the middle and emarginate on each side posteriorly on 

 dorsal segments 2-6, the apex of the first ventral segment 

 and a large spot marked with a narrow black lunule on each 

 side of tiie ventral segments 2-5, largest on the second and 

 gradually diminishing in size to the fifth, yellow. Wings 

 hyaline, nervures black. 



Length 21 mm. 



Hab. Stradbroke Island (^1. ./, Turner) ; January. 



Type in coll. Froggatt. 



Allied to typical Thynnus by the hypopygium, but in 

 some points nearer to Ashmead's group ZaspUothi/nnus. It 

 is very nearly allied to T. elgneri, Turn., from Cape York, 

 but in that species the hypopygium is narrower at the apex 

 and the legs are ferruginous; it is also very much smaller 

 than the present species. Until the female is known I think 

 it better to connect these two species with the typical 

 Thynnus group rather than with Zaspilothy anus, thougli it 

 is quite possible that the females, when discovered, will 

 prove to be nearer the latter. 



Thynnus ventralis^ Sm., var. desiccatus, var. n. 



Specimens of this species received lately by the British 

 Museum, collected by Mr. H. J. Hillier at Hermansburg, 

 Central Australia, diflfer from the common form from the 

 N.W. Coast as follows : — 



(J . The yellow spots on eac'i side of the fourth and fifth 

 dorsal abdominal segments, which are always present in the 

 specimens I have seen of veulralis, are absent in var. desic- 

 catus, in which also the femora and tibiae are ferruginous 

 instead of yellow, and the mesopleuiae, mesonotum, u)eta- 

 sternum, and intermediate and posterior trochanters and coxaj 

 black instead of yellow. 



$ . The variety has the clypeus black instead of yellow 

 and the anterior margin of the pronotum is distinctly raised, 

 which is not the case in the type of the female, the sternum 

 and coxa3 are also black in the variety, except a small yellow 

 spot at the base of the intermediate and posterior coxae. 

 There ai-e four males and two females in the ^luseum 

 collection. 



