MonophlebincE. 443 



seven contiguous beads ; there is a crowded band of these small pores across 

 the base of the abdomen, on the venter, defining the anterior limit of the ovisac. 

 The number of beads is constant for each type of pore. The larger pores are 

 probably concerned in the secretion of the tubular filaments, the smaller pores 

 providing the mealy material. There are three large subcircular ventral scars, 

 near the posterior extremity, with a reticulate surface which is occasionally 

 wholly or partly pigmented. Anal orifice surrounded by a rather dense group 

 of stout hairs. Length 275 to 4 mm. 



Nymph {figs. 4, 5) with six-seven jointed antenna;. Derm not so closely 

 covered with hairs and pores ; the latter of two types only, the largest form 

 (that surrounded by a chitinous plate) being absent. Tarsus proportionately 

 longer than in the adult. 



Young larva {figs, i, 2) at first pale red, deepening later to crimson ; the 

 colour afterwards masked by a covering of yellowish, closely curled filaments. 

 Antennas six-jointed, the sixth with four long whip-like hairs on the apical half 

 Kfig- 3)- Margin of body with a series of long setse, collared at the base ; the 

 last pair on each side (exclusive of the caudal setae) twice as long as any of the 

 others ; similar but rather smaller setae dispersed over the dorsum. Derm 

 with many small pores, the orifice surrounded by six contiguous beads {fig. 29) ; 

 a marginal series of larger pores, with 8-shaped orifice surrounded by eight 

 beads {fig. 30). 



Egg bright orange yellow. 



Male puparium {fig. 9) cylindrical, white, compact ; open at posterior 

 extremity. Length 7 to 8 mm. 



Male nymph {fig. 10) dull purple, dusted with white meal ; limbs strami- 

 neous. 



Adult male {fig. 11) dull purplish red, the sides of the abdomen clothed 

 with white woolly secretion ; limbs and antennte purplish brown. Head {fig. 12) 

 broad, produced in front between the basal joints of the antennas. Compound 

 eyes moruloid, on short lateral processes ; a prominent black ocellus at the 

 inner angle of each eye. Antennas ten-jointed, the two basal joints short, the 

 remainder elongate and bi-nodose, with a whorl of long hairs on each node. 

 Wings purplish grey, with a powdery bloom ; costal area brownish ; surface 

 minutely wrinkled. Abdomen hairy ; posterior extremity with a pair of pro- 

 minent fleshy appendages bearing five or six long setae {fig. 13) ; penial sheath 

 short ; broad at base and tapering to a blunt point. Length 2-5 mm. ; expanse 

 of wings 5 mm. 



On a coarse grass {Spinifiex sqiuirrosiis) growing on sand along the sea- 

 coast : Chilaw. Received also from India (Madras). 



Although normally oviparous, eggs being deposited in a well-developed 

 ovisac, advanced embryos may be observed in many individuals, suggesting a 

 partially ovovivi parous habit. 



