308 PERCY SLADEN TRUST EXPEDITION 
The detailed figures in the plates have been reduced from large scale camera lucida 
drawings; the insect was in all cases carefully set in the proper plane by means of 
sighting the orbital bristles and the vibrissee etc. till they just came over one another. 
Most of the drawings are thus exact views of the individual insect’s head ; in some cases 
the insertions only of the bristles are shown, giving a more diagrammatic view. 
Most of the wings were photographed from dry slide specimens; a large scale was 
adopted from which the figures were reduced: in the case of a unique specimen, or a very 
small set in which one specimen could not be spared for the mount, a large scale camera 
lucida drawing was made as for the heads. 
Since nearly every species has its wings figured, no description of the venation is (in 
general) given in the text. In some cases the wings of species that have already been 
described by others are figured where no such figure exists in the original papers*. 
Heteroneuride. 
HETEROMERINGIA Ozerny, Wien. Ent. Zeit., xxi. (1903), p. 72. 
1. Heteromeringia plumicornis, n. sp. (Fig. 1 and Plate 19, fig. 1). 
This species is a very pale form, and from the description and figures of Hendelia 
Beckeri, Cz. (Czerny, t. c., p. 84 and Taf. 2, figs. 1, 2, 3) must have a considerable super- 
ficial resemblance to that species. 
Head. Eyes bare. Top view :—frons entirely orange and shining, paler towards 
the front: the small central area between the three ocelli is shiny black. Hind margin 
somewhat concave. Chetotaxy normal; front f. 0. b. touching at tip; next pair parallel; 
hind pair somewhat divergent; 1. v. parallel; 0. v. divergent; p. v. finer, long, much 
divergent, inserted just on vertex very close together; cc. fine, divergent, inserted 
between front and side ocelli; post oc. row longest just at back of head. All the bristles 
somewhat orange. Front view :—antennz well separated at base, face about square ; 
usual two convergent vibrissee with minute following row: face all pale yellow, slightly 
hollowed. Side view (Plate 19, fig. 1) :—likewise all yellow in colour as are the palpi 
and the thickened hairy tongue. Antenne yellow, except that the upper basal part of 
third joint is black: the second joint has an elegant calyx-like form and a well-marked 
spine ; the arista is very stout, black, and profusely haired all round with stout black hairs. 
Thorax. Orange, shining, covered with fine bristles, and with two brown stripes 
extending from near the front to the scutellum. Pleuree shining, darkened from below 
humeri to abdomen, scutellum a little darkened laterally on the disk. Two d. «. b. on 
each side along the inner margins of the brown stripes; one h., two n. p., one i. a., one 
s. a. bristle. Scutellum with two small dorsal bristles and two large subparallel terminal 
ones. 
Wings, as Fig. 1, glassy with brown veins; a little darkened at tips. Halters orange. 
Legs, pale yellow, all the tibiz and tarsi somewhat infuscate. Front femora with a 
regular row of spines on lower face, middle femora with a similar strong row beneath ; 
* A first set of the material, including the Typxs of all new genera and species, will be placed in the 
British Museum. A second set will be retained in the Cambridge University Museum. 
