3. PSILOCEPHALA 587 



spicuous orange genitalia, and in the female by the black 

 abdomen with conspicuous white lateral spots. 



(J. This description of tlie male is made from two German specimens in 

 Kowarz's collection. 



Face and frons covered with dense silvery white tomentum, but with no 

 pubescence ; sides of the face almost parallel ; similar silvery white tomentum 

 extends over the jowls and under the eyes to all the back part of the head, 

 but on the jowls and lower half of the back of the head there is in addition 

 long silvery white pubescence (not connected with any similar pubescence on 

 the front coxae); lower half of the back of the head considerably inflated 

 from the eyes, but the upper half only moderately so, and on this upper half 

 there is practically no pubescence but about fifteen stout black bristles not 

 far from the eyes which when seen from in front form a postocular ciliation 

 (even slightly bent forwards over the eyes), and a few similar but longer 

 bristles occur more on the absolute back of the head well away from the 

 eyes • vertex more greyish white and bearing numerous very short black 

 bristles on its middle and back parts; coUarwith a circlet of stout black 

 bristles. Proboscis brown, rather long ; palpi light brown, nearly half as long 

 as the proboscis, curved up on the sides of the depressed lower part of the 

 face, and only very slightly pubescent. Eyes touching on the frons for only 

 a short distance as the frontal triangle extends fully half-way up to the 

 vertex and the vertical triangle extends more than a quarter of the way down 

 to the antennae, front profile of the eye forming an even curve from top 

 to bottom but the hinder side almost straight ; facets all equal. Antennae 

 brown ; basal joint dusted greyish and bearing numerous black bristles ; 

 second joint only about a quarter the length of the first and bearing only short 

 black bristles; third joint paler brown, about as long as the two basal ones 

 together and tapering to the stout jointed apical style, which further tapers 

 to a point and is about one-third the length of the third joint. 



Thorax light (almost whitish) grey with three broad dull black stripes • 

 middle stripe extending to the front but rather greyish there and contracted 

 on the hind quarter to a rather narrow line ; side stripes considerably 

 shortened in front and becoming vague on the hind quarter of the disc ; pleurae 

 rather silvery grey. Pubescence very short and inconspicuous being mainly 

 depressed and yellowish or greyish white, but with some still more incon- 

 spicuous suberect short thin black hairs intermixed ; pleurae with only 

 short whitish pubescence on the hind part of the mesopleurae and still 

 fainter pubescence on the fore part of the sternopleurae, but with a rather 

 dense and long tuft on the metapleurae. Bristles almost normal as on fig. 

 311 ; prjesutural only three, and praescutellar two strong pairs. Scutellum 

 greyish, with slight pale pubescence and two pairs of black marginal bristles ; 

 metanotum bare, light grey. 



Abdomen glistening silvery through abundant but not dense short adpressed 

 white pubescence on a very light slaty grey ground colour ; second to fifth 

 hindmai'ginal hems white (when seen from above), the one on the second 

 segment being conspicuous but the last two rather narrow • when seen side- 

 ways the whole abdomen appears more silvery but the white incisures dis- 

 appear ; pubescence on the basal segment longer but still much depressed, as 

 is also the pubescence down the sides to the end of the sixth segment ; seventh 

 segment very short. Belly similarly colored and clothed but with a more 

 yellowish hue (especially about the hindmargins) and with only very sparse 

 pubescence ; the tubular form of the abdomen appears to cease at the end of 

 the fifth segment. Genitalia conspicuously orange large and long,_ being as 

 long as the three previous abdominal segments together, and well distinguished 

 from the abdomen ; upper plate large and long and rather flattened above but 

 curved over at the sides to half the depth of the genitalia, and prolonged at 

 its end on each side into a process (with a small rounded down -turned lobe 

 at its outer end) so that an almost quadrate opening is left with its basal 

 side a little produced in the middle so as to make it more heart-shaped, 

 but this open space is occupied by another lower middle process, and the 

 side ]3rocesses sometimes become blackish towards their tip ; lower lamellae 



