1G8 CATALOGUE OF DIPTERA 



Pubescence very thick and soft on the abdomen and legs : the middle 

 shanks and metatarsi in the male, within, clothed with longer black 

 hairs ; and the fore metatarsus terminates in a smaller tooth than 

 in the others : tips of fore shanks and the feet dusky : wings 

 hyaline with yellowish nervures. 



Var. /3. — Smaller : the back of the abdomen dusky : the anus pale : 

 legs clouded with brown : middle shanks and metatarsi of male 

 scarcely bearded : pubescence not so dense. Probably a distinct 

 species. 

 Inhabits marine rejectamenta. 



Actora buccata. 



Heteromyza buccata, Fallen ; but does not agree with that genus, 

 the mouth and legs being without bristles, and thickly clothed with 

 soft furry down as in Actora /Estuum. ( Helcomyza ustulata, 

 B. E. GS.) From that species it differs in having the face rather 

 less perpendicular, the 2d joint of the abdomen proportionally 

 shorter, and the rib of the wing destitute of bristles, characters, I 

 think, quite insufficient to separate generally two species so allied 

 in habit. 



Heteromyza oculata. Fall. 



Male, eyes large, approximate, fiery : front linear rufous : face pale 

 rufous : antennae black : thorax dull black, beneath grey : abdo- 

 men linear, rufous, villous : legs long, rufous : fore thighs dusky : 

 wings blackish, the interval between the 1st and 2d costal nervures 

 yellowish : about the middle of the rib are a few minute bristles. 



Female, front of the usual breadth, rufous : occiput and margin of the 

 eyes csesious : thorax behind light grey, before blackish (disco- 

 loured ?) : abdomen rufous, not villous : wings as in the male, 

 but without the yellowish space at the rib : legs not so long. 

 (Length .26.) 



Helomyza ustulata ? 



Female, ferruginous : abdomen, with a hoary tinge, and narrow 

 blackish incisures : transverse nervures, and three spots at the clip 

 of the wings, dusky ; these spots are not produced into the disk or 

 connected as in H. ustulata : third joint of the antennae elliptic, 

 with the seta delicately pubescent (Length .26.) 



Tetanocera vittata. Ferruginea, vittis, frontis luteis, thoracis 



canis, alts fusco-cancellatis. (Long. .19.) 

 (To division A. h.) Front not much produced, orange, with the 



margin of the eye and the glossy middle stripe ferruginous : occiput 



