418 



UNITED STATES NATIONAL MUSEUM BULLETIN 224 



Abdomen : The abdomen at the base is nearly as wide 

 as the thorax and begins to narrow slightly at the base 

 of the second tergite. Sides of first tergite with a 

 vertical row of 3 or 4 moderately long, stout, pale 

 bristles. Middle of the sides of all remaining tergites 

 with long, pale, backwardly directed bristles and addi- 

 tional, fine pile. Abdomen densely covered with fine, 

 micropunctures and with blue to purple reflections. 

 There are seven tergites only in the male, the seventh 

 moderately well developed, rounded or narrowed 

 apically. The male terminalia large and conspicuous, 

 fully rotate. The epandrium forms a short, oval but 

 remarkably convex bulb with, on each side posteriorly, 

 a moderately long, attenuate, convergent process ; these 

 processes come to lie side by side but separated by a 

 short distance. The gonopod laterally is almost as 

 convex, but much shorter and abuts against the end of 

 the seventh tergite. Gonopod very tightly enclosed by 

 epandrium but not fused and bears a terminal process 

 with a flange or knob at apex. Aedeagus extends as 

 far as the other processes and has a dorsal and ventral 

 hook at apex. The hypandrium is present but short. 

 No females seen. 



Distribution: Australian: Adelodus nigro-coeruleus 

 Hermann (1912) ; mfipes Hermann (1912). 



Bromotheres, new genus 

 Figubes 255, 680, 1332, 1341, 1813, 2109 



Type of genus: Atomosia australis Ricardo, 1913. 



Characterized by the presence of scattered pile over 

 the whole of the face ; the dorsal incision on the third 

 antennal segment; the presence of a long pair of stout, 

 ocellar bristles and a single, long, stout, ventral bristle 

 on the first antennal segment. There is short, ap- 

 pressed, thoracic pile in both sexes ; the punctulate ab- 

 domen bears stout, conspicuous bristles on the sides of 

 the tergites. Male terminalia moderately conspicuous 

 and not concealed. Eelated to Adelodus Hermann and 

 distinguished by the closed male terminalia and the end 

 of the discal cell, which is not aligned with the end vein 

 of the fourth posterior cell, and the absence of the long, 

 scalelike components found in the mystax of Adelodus. 

 In addition, in Adelodus the hind femur is strongly 

 swollen and it and the tibia lack the dense fringe of 

 erect pile. Length 8 mm. 



Head, lateral aspect : The face is almost plane with 

 the eye margin on the upper half but moderately prom- 

 inent and gently receding below. The eye is distinctly 

 narrower on the ventral half and slightly recessive an- 

 teroventrally on the posterior ventral fourth. The 

 occiput is narrow, scarcely visible through the middle of 

 the posterior profile, obliterated on the upper third and 

 moderately prominent below. Occipital pile short and 

 very scanty in the middle, abundant and long below, 

 with 3 pairs of exceptionally stout, rather long bristles 

 behind the upper corners of the eyes and a single, 

 weaker, laterally directed bristle placed medially at the 

 upper third of the head. Proboscis small, obliquely 



directed downward, cylindrical and swollen towards the 

 base, especially from the dorsal aspect. The apex is 

 obtuse and carries a few, stiff hairs. The base below 

 has 5 or 6 long hairs. Palpus quite small and cylindri- 

 cal, of 1 segment, with a second, short, fused segment. 

 The antenna is attached above the upper third of the 

 head. The first segment is iy 2 times as long as the 

 second ; both the first and second segments are slightly 

 compressed, the third more strongly compressed. The 

 third segment is twice as long as the combined length of 

 the first two, a little wider in the middle and gently 

 tapering towards base and apex; the dorsal surface in 

 the middle sublaterally has a distinct excision bearing 

 a pale, short spine. First segment with 1 or 2 minute 

 setae dorsally, 2 or 3 short setae ventrally, and a long, 

 stout, ventral, sharp bristle fully as long as the com- 

 bined length of the hrst 2 segments. Second segment 

 with 2 or 3 short setae below; apex of third bluntly 

 rounded. 



Head, anterior aspect : The head is not wide. The 

 face below the antenna is one-fourth of head width and 

 narrowed in the middle but widening below. Sube- 

 pistomal area rather small and short, nearly horizontal, 

 slightly concave and bare. The face is pubescent with 

 on the upper half 8 to 10 short, bristly hairs and 2 to 4 

 additional, longer, bristly hairs; and on the lower fifth 

 transversely above the epistoma a rather dense band of 

 long, oblique, distinctly and widely flattened hairs 

 which are present in both sexes. Pile and pubescence 

 in both sexes pale, brassy yellow ; the male has 3 pairs 

 of widely separated, long, yellow bristles on the lateral 

 margins of the subepistomal region. Female with 4 

 pairs of bristles similarly placed and a little longer, a 

 little stouter and black. The fourth and lowest bristle 

 is quite short and delicate. Front distinctly divergent, 

 the vertex of the same width as the upper front, the 

 sides bear only a few relatively weak, bristly hairs. In 

 the female there is a single slender, very weak bristle. 

 Vertex deeply excavated with oblique, sloping sides ; the 

 ocellarium is large and high with nearly vertical sides 

 bearing a pair of long, stout, divergent bristles and pos- 

 teriorly a few, minute setae. Anterior eye facets 

 enlarged. 



Thorax: The mesonotum is bare and shining; the 

 pleuron is mostly fine pollinose, with an enlarged bare 

 spot on the mesopleuron. The pile of mesonotum in 

 both sexes is quite short, flat appressed, curled setate. 

 Acrostical and dorsocentral elements are not differen- 

 tiated. Humerus setate. The lateral bristles are stout 

 and consist of 1 short, slender notopleural and 2 moder- 

 ately long, stout, supraalar bristles ; 1 similar postalar ; 

 and the scutellar margin with 2 or 3 slender, bristly 

 hairs. Propleuron with fine, long pile. Pronotum 

 with 1 or 2 pairs of weak, pale bristles. Upper meso- 

 pleuron with short pile and 1 bristle ; upper hypopleu- 

 ron with 5 or 6 quite fine, long hairs. Lower posterior 

 sternopleuron with 4 or 5 short, stiff hairs. Meta- 

 pleuron with fine, long, fanlike, very slender hairs. 

 Metanotal slopes with 3 or 4 stiff, short bristles ; 1 pair 

 is especially stout and longer. Metastemal slopes with 



