Melittia contains usuall}- large and robust forms, fore wings generally 

 opaque, tongue moderate or rather short, antennae subclavate, the post- 

 erior legs very densely clothed with long hair forming prominent tufts or 

 brushes nearly to the end of the tarsi. The latter character is the most 

 prominent and is distinctive of this and, to a less e.xtent of the two fol- 

 lowing genera. 



Larunda has the primaries opaque, secondaries with but a small 

 vitreous spot at base. The palpi are short, with a broad spreading tuft of 

 hairs. Tongue almost obsolete, caudal tuft large, fiat, spreading. The 

 antennas are moderately pectinated in the (^, almost simple in the 9- 



Euhagena has both pairs of wings opaque. The posterior tibiae are 

 clothed with hair similar to but not so long or dense as in Meliflia. An- 

 tennae twice the length of the thorax, very deeply pectinated except at the 

 tip where the pectinations seem soldered together in a solid mass. The 

 tongue is short and week. 



Alcathoe has a much less marked tibial tufting, and is distinguished 

 in the (^ by a caudal appendage, as long as the abdomen. The fore- 

 wings of the (^ are partly transparent, in the 9 '•^^7 '^^^ opaque as in 

 Sciapteron. The tongue is not mentioned, but is probably short, the 

 antennae lamellate beneath. 



Pheinonoe is distinguished by the anal appendages of the male, not 

 half as long as the abdomen and 5 in number. The forewings are opaque. 

 Nothing is said of the tongue or of the antennae. 



Trochilium contains large species as a rule, with transparent wings, 

 obsolete tongue, sub-clavate antennae with a brush of hair at tip, and 

 rather densely clothed legs, not forming tuftings however as in some of 

 the preceding genera. 



Betnbecia has short filiform antennae, very shortly bipectinate, no 

 brush at tip. The eyes are small, tongue strong and corneous. Abdomen 

 with a broad somewhat truncate anal tuft. 



Sciapteron has the antennae very slightly thickened toward tip, which 

 is furnished with a little brush of hair ; in the male lamellate, the lamella,- 

 with a double series of bristly tufts. Tongue strong, corneous. The 

 primaries are opaque or have but a small transparent space at base. 



Fatua is based on a single species — demidatum — in which the sexes 

 differ remarkably. In the male the primaries are long, very much 

 narrowed towards the base, not covered with scales. Secondaries very 

 large, ample, rounded on anal margin. Legs long and slender. Antennat 

 with very deep pectinations, ceasing before the tip, which is a solid mass, 

 and bears some fine bristles. — Female less robust. Primaries opaque 

 except a space near the internal angle. Antennae roughened but not 

 serrated, much thickened towards the the tips ; abdomen very long. 



