110 
ROWLAND E. TURNER 
This is very distinct from A. rotundiceps Sm. the only other 
Agriomyia as yet recorded from Cooktown, and is nearer to A. luctuosa 
Sm. though quite distinct. 
Thynnus (Zeleboria) compar sp. nov. 
Ç . Head half as broad again anteriorly as long, strongly roun¬ 
ded posteriorly; punctured, finely and closely on the front, very spar¬ 
sely on the vertex, a short longitudinal sulcus on the front. Pronotum 
shining and almost smooth, much narrower than the head, a little 
broader than long, with a deep longitudinal sulcus from the anterior 
margin to the middle, the anterior angles prominent and subtuberculate, 
a shallow depression on each side near the posterior angles. Scutellum 
sparsely punctured, about half as long as the pronotum, rounded pos¬ 
teriorly; median segment closely punctured, about the same length as 
the scutellum, broadened and steeply sloped posteriorly. Abdomen much 
broader than the thorax, half as long again as the head and thorax 
combined ; the first segment punctured rugulose, the apical margin 
slightly raised, with a transverse groove before it ; the second segment 
with four transverse carinæ including the raised apical margin which is 
lower than the other carinæ; the remaining segments punctured, finely 
aciculate at the base. Pygidium deflexed, the posterior surface oval, 
small, with a short longitudinal carina from the base and the lateral 
margins slightly raised. Fifth ventral segment punctured. Tarsal ungues 
bifid. 
Black; the anterior margin of the head luteous, mandibles, an- 
tennæ, front between the antennæ, legs, two basal abdominal segments 
and the pygidium fusco-ferruginous ; the apical margins of the third 
and fourth segments narrowly testaceous. 
Length 6—7 mm. 
cT. Clypeus advanced and truncate rather broadly at the apex, 
moderately convex and without a carina, finely and closely punctured 
and clothed with grey pubescence. Head finely and closely punctured, 
wilhout a frontal sulcus, the interantennal prominence bilobed. An¬ 
tennæ slightly longer than the thorax and median segment combined, 
slender, the apical joints moderately arcuate. Thorax finely and closely 
punctured; the pronotum shining and sparsely punctured, narrowed 
anteriorly, the anterior margin slightly raised ; a transverse depressed 
row of deep punctures at the base of the scutellum. Median segment 
sparsely punctured with a very faintly impressed line from the base 
nearly reaching the apex, longer than the mesonotum and longer than 
