3. OXYCERA 109 



10. O. dives Loew. Cubital vein forked. Abdomen with five isolated 

 yellow spots of which the second pair resembles the first pair in shape. 

 Tibias black. Eyes clothed with dense black hairs. 



A rather large very dark species. 



S. Face and frons forming a small black almost equilateral triangle but so 

 densely punctate as to be rather dull, clothed with dense long black 

 pubescence of which that on the frons is cbrected rather upwards ; jowls and 

 lower part of the back of the head mainly indicated by their abundant long- 

 black pubescence ; upper part of the back of the head clothed Avith thinner, 

 shorter, and scarcer pubescence ; vertical triangle bearing long and rather 

 abundant forwards-directed pubescence ; proboscis orange. Eyes aiii:»arently 

 touching for about one-third the distance between the occiput and the antennae, 

 but a row of black hairs exists between them which is longer than the con- 

 tiguous pubescence on the eyes, and this latter pubescence is remarkably 

 lo)ig, dense, and black, except that the hairs about the lower hind corners of 

 the eyes may be rather greyish ; facets on the larger brown upper part much 

 larger than those on the smaller black lower part and the line of contrast well 

 marked. Antennae black or brownish black ; two basal joints with short 

 black bristles ; third joint slightly longer than the two basal joints together ; 

 arista slightly longer than the annulated third joint. 



Thorax black, considerably dulled by the dense coarse punctuation ; 

 humeral knob yellow, and also a line along the upper margin of the meso- 

 pleurae, and this line begins rather narrow but widens a little downwards as 

 it approaches the wing-base ; there is also a small rounded yellow spot on 

 each side at the point where the thoracal suture bends backwards • postalar 

 calli sharply yellow as sloping oblong spots. Pubescence mainly long, dense, 

 and black, but the hairs on the lower part of the pleurae are thinner in 

 texture and may be I'ather greyish. Scutellum bright yellow ; spines orange 

 but with the apical two-fifths black ; pubescence black and rather long but 

 sparse ; metanotum shining black, transversely rugose. 



Abdomen shining black, but obscured by the dense coarse punctuation on 

 the second and third segments ; the punctuation on the fourth and fifth 

 segments is more scattered and hence the disc there is more shining ; there 

 are five large isolated yellow spots, being a pair on each of the third and fourth 

 segments and one at the tip ; the pairs of spots are large, but do not quite 

 reach either front- or [liindmargin of their segment, and they are rounded on 

 their inner margin ; the pair on the fourth segment are similar to those on 

 the third but are slightly more transverse, and consequently the middle half 

 of the dorsum is left black on the third segment, but as the fourth segment is 

 narrower and the spots more transverse less than the middle third of that 

 segment remains black • all these spots extend over only the hinder half of 

 the sidemargins of each segment ; tip with a large shallow transverse spot 

 which is arched anteriorly but emarginate at the middle, and which leaves the 

 whole foremargin of the segment black though more narrowly so on the 

 middle. Pubescence all very short and black, though as usual rather longer 

 about the sides of the two basal segments, dense where the punctuation is 

 dense, but sparse where the punctuation is sparse. Belly all dull black ; 

 pubescence gTeyish l)lack, fairly long and dense on the basal segments but 

 short and blacker on the I'est. Genitalia small and almost concealed but 

 forming a flattened black arch and at the end there is a pair of short brownish- 

 black pale-haired lamellae. 



Legs mainly black, but all the knees narrowly and the extreme tip of the 

 tibiae orange ; tibiie and tarsi with a brownish appearance which is mainly 

 caused by the dense closely recumbent very short pubescence, though the base 

 of the hind tarsi may be rather orange ; soles of all the tarsi gilded ; front 

 femora shining anteriorly and bearing a slight black posterior ciliation, 

 Pulvilli brownish orange ; claws black. 



Wings conspicuously blackened but slightly bleached near the tip and 

 liindmargin ; costal cell and base rather yellowish ; veins mainly 1)rownish 

 black, but the basal half of the costal vein (excluding the base itself) and the 



