432 Monophlebince. 



filaments from the marginal area. Legs, antennae, and eyes black. Genital 

 orifice surrounded by a bright pinkish area, free from the mealy secretion. 



Antenna {fig. 4) eight-jointed, robust ; joints one to three subcylindrical ; 

 four to seven narrowed at base and more or less gibbous ; eighth elongate, equal 

 to or longer than six and seven together. 



Legs {fig. 5) robust ; tarsus of mid leg less than half the length of tibia ; 

 tibia considerably shorter than the combined femur and trochanter. Claw 

 varying in form from short and blunt {fig. 6), to long and sharply pointed 

 {fig. 7) ; a pair of small and simple ungual digitules ; tarsal digitules repre- 

 sented by slender setce. 



Anal aperture {fig. 8) opening into a wide chamber with a fringe of irregular 

 lobes at its inner end. 



Dorso-abdominal spiracles {fig. 9) large and conspicuous ; seven on each 

 side, the fifth pair situated approximately on a level with the anal orifice ; the 

 entrance of each spiracle lined with a crowded group of multilocular pores of 

 similar character to the dermal pores. 



Derm crowded with large translucent cells, larger and more conspicuous 

 on the dorsum, varying in form from subciixular to irregularly ovoid, or 

 obscui-ely polygonal ; each cell associated with either a pore or a seta (see 

 figs. 9, 10). 



Dermal pores distributed closely over both surfaces of the body, those on 

 the dorsum more sharply defined. Each pore has a strongly marked chitinous 

 peripheral ring, and a central orifice which may be two-, three-, or four-loculate 

 {fig. 10). The space between the peripheral ring and the central orifice is 

 occupied by a circle of from four to six rounded cells separated by sharply 

 defined divisions. 



The whole body is densely clothed with comparatively short setos which are 

 broader towards the base and taper rapidly to a fine point (see figs. 9, 10). The 

 anal orifice is surrounded by a lax group of very much stouter setce, and some 

 still larger setae occur on the posterior marginal area {fig. 11). 



My few examples vary in length from 10 to 14 mm., with a breadth of from 

 6 to 9 mm. 



Other stages not observed. 



Described from three examples found on the stem of Phyllanthus sp., at 

 Haldummulla. Single examples were found, subsequently, on unidentified 

 plants, at Kandy, Matale, and Wellawaya. Received also from India (Sukkur 

 Forest, Scind), on Tamarisk. 



Closely allied to M. tatiiarindus^ Green, from which this species differs in 

 the presence of enlarged setre on the posterior margin and surrounding the anal 

 orifice. 



The British Museum contains the type of Monophlebus C07itrahens — repre- 

 sented by a single specimen of which the antennae and limbs are imperfect. In 

 form and all external characters it agrees closely with my examples from 

 Ceylon. Signoret, in his description of the species, draws attention to the 

 presence on the terminal joint of the antennas of ' three hairs much longer than 

 the others.' In my examples the hairs vary considerably in size, but I cannot 

 detect any particular three of outstanding length. As such hairs are easily 

 detached and lost during the process of preparation, I am not inclined to 

 separate my insects on the strength (or weakness) of this negative character. 



Walker's type is labelled as from China. Signoret's more detailed descrip- 



