398 R. OSTEN SACKEN 



ches from the foot of the halteres , across a portion of the 

 pleurae and the pectus, between the front and middle coxae and 

 thus reaches the corresponding point on the opposite side. When 

 the head in broken off, it becomes apparent that the part of 

 the thorax against which it is applied , (front part of the col- 

 lare), is also black (it is red in P. fulvicollis). The head is, 

 proportionally , much smaller than in P. fulvicollis , the legs 

 shorter, the wings comparatively shorter and much narrower ; 

 they are not tinged with reddish at the root ; the anterior branch 

 of the fork of the third vein is a Httle more oblique and the- 

 refore a trifle longer. The valves of the forceps of the male are 

 much larger than in P. fulvicollis, and, in all my (dry) speci- 

 mens, gaping. 



The four species of 'Piccia , enumerated above, and so much 

 alike in coloring, may be tabulated thus : 



I. The anterior branch of the third vein originates near the snaall 



crossvein , and runs alongside the posterior branch : body 



black, the disc of the thorax alone, more or less reddish . melanaspis. 



II. The anterior branch of the third vein originates a long distance 



beyond the small crossvein, and is short and oblique. 



A.. The thorax is altogether red (including scutellum , meta- 



notum ad pectus) ; root of the wings reddish .... fulvicollis. 

 AA. Some portions of the thorax are black ; root of the 

 wings brown. 

 a. Collare, pleurae, pectus and metanotum black . . . tergorata. 

 aa. Metanotum red ; pleurae and pectus black, except a broad 

 red stripe which extends from the foot of the halteres, 

 across the pectus forcipata. 



Plecia sp. — One o^, Hatam, N. Guin. July 1875 (Beccari). 

 A small, brownish species; thoracic dorsum with darker 

 stripes. 



GULIGIDAE. 



Megarrhina sp. One 9; Kandari, Celebes, April 1874 (Beccari). 



Has a good deal of M. suhulifer Dol. {^ oi Amhoinensis 

 DoL), but the fringe of hair at the end of the abdomen, on 

 both sides is yellowish-orange, and not black. Is hkewise diffe- 

 rent from M. immisericors Wk., of which I have seen the type. 



