Explanation of Plate VII. 



N.B. — The figures do not illustrate the many points touched on in 

 the paper, but are intended to show one or two of the more striking 

 characters common to the Dolichopodidse, Phoridse, Lonchopteridae 

 and Leptidse, and the absence of affinity to the Muscidae. 



Fig. 1, Antenna of Conicera atra, Mg. ^. Diagram in optical 

 section, as seen with a magnification of 300 diameters (all the figures 

 of antennpe are drawn in a similar manner, their size being regulated 

 by convenience for comparison). To show the peculiar articulation 

 of the third joint ; I would also draw attention to the bristle-sockets 

 on the distal joint of the arista. The antennae of the female differ 

 in shape, but are articulated in the same way. 



Fig. 2. Antenna of Phora rvficornis, Mg., to show the same points 

 as in Fig. 1. The sexes do not differ in the shape of the antennse. 



Fig. 3. Antenna of Lonchoptera flavicauda, Mg., to show the 

 similarity of articulation to that found in the Phoridse and Doli- 

 chopus. The bristle-sockets on the arista are also similar. 



Fig. 4. Antenna of DoUchopus acuticornis, W. (?), In addition 

 to the peculiar articulation, this species has a process, possibly the 

 remains of a joint, between the second and third joints, exactly 

 similar to that found in C atra. The bristle-sockets on the arista 

 are absent. 



Fig. 5. Antenna of Scatophaga lutaria, F. To show the usual 

 method of articulation in the Muscidse (invariable as far as my 

 observations go, even such long third joints as are found in Loxocera, 

 retaining it). A third method of articulation is visible to the 

 ordinary lens, and calls for no remark, except that it is dissimilar 

 to those figured. 



Fig. 6. Antenna of Oymnoptemus assimilis, Staeg. To show a 

 similar articulation to the other four species. 



Fig. 7. One of the labella (paraglossae) from the mouth parts of L. 

 fiavicauda, to show the arrangement of the tracheae, the plate from 

 which they spring and the large number of sensory hairs on the edge. 

 Actual size of the part, length f^ mm. or y^^ inch. 



Fig. 8. One of the labella of Leptis conspicua, Mg., for comparison 

 with L. Jiavicauda and Phora concinna, Mg, ^ . The tracheae spring 

 from a plate, the arrangement is similar, and there are a great 



