Hymenoptera in the British Museum. 65 



The scale-like hairs on the first dorsal segment are not 

 very strongly developed in this species. 

 Hah. N. Queensland, Kuranda. 



Genus Psammochares, Latr. 



The Australian species still included in this genus fall 

 into several sections, which will doubtless eventually be 

 raised to generic rank ; but I consider it best to wait until 

 a more comprehensive revision is possible, in the meantime 

 defining certain groups of related species. One of these 

 groups, somewhat alHed to Batozonus, Ashm., and Efisyron, 

 Schiodte, has the tarsal ungues of both sexes bifid as in the 

 latter genus, but has the joints of the flagellum in the male 

 strongly arcuate beneath as in Batozonus, though shorter 

 than in that genus, and differs from both in having the 

 cubitus of the hindwing interstitial with the transverse 

 median nervure. The median segment of the female is 

 truncate at the apex and more or less emarginate, with a 

 distinct median sulcus on the dorsal surface ; and the third 

 cubital cell is much narrowed on the radius. The sexual 

 dimorphism in the group is great, much greater than in 

 Episyron, though less than in Batozonus. The species 

 included are— 



1. Psammochares consimilis, Sm. 



Pompilus consimilis, Sm.. Descr. new species Hymen., 

 p. 152, 1879, $. 



$. Nigra; fronte, vertice, pronotoque pilis brevissimis auran- 

 tiacis, subsquamosis, stratis, dense obtectis; postscutello macula 

 utrinque segmentoque mediano angulis posticis albo-pilosis ; seg- 

 mentis dorsalibus 2-3 fascia transversa grisea utrinque ; alis fuscis, 

 apice obscurioribus, venis fuscis. 



(J. Niger; antennis fusco-ferrugineis, scapo supra infuscato, 

 segmento dorsali sexto albido; segniento mediano angulis posticis 

 albo-pilosis; fronte, pronoto, segmentis dorsalibus 1-3 fascia lata 

 basali, quarto quintoque omnino griseo-pubescentibus ; alis fusco- 

 hyalinis, apice obscurioribus. 



Long. $, 14 mm ; cj, 12 mm. 



$. Clypeus widely but very shallowly emarginate at the apex, 

 the labrum exposed. Head somewhat flattened, the posterior ocelli 

 nearly twice as far from each other as from the hind margin of the 

 head. Second joint of the flagellum less than half as long again as 



TRANS. ENT. SOC. LOND. 1917. — PART I. (NOV.) F 



