NOTES ON ORIENTAL HEMIPTERA, 



597 



reported by Schouteden to have 7 nymphal instars, 

 Insektenbiol. II. 82—8, figs. 1 —9 (1906)). 



I. Orange coloured ... Instars 1, 2 

 II. Blood -red ... ... Instars ?>— 7 



and 

 III. Blood-red and green... Instar 8 

 The duration of the metamorphoses was as follows :— 



Copulation, February 16th to March 2nd ... 13 to 1 



Interval, March 2nd to 5th ... 



Ova laid March ;">th, hatched 30th 



Second instar hatched April 4th 



Third 



{cf. Zeitschr, Wiss 



days 



Fourth 



Fifth 



Sixth 



Seventh 



Eighth 



May 



8 th 

 13th 

 28th 



7 th 

 14th 

 1 5th 



3 



25 

 5 

 4 

 5 



15 

 9 

 7 



11 



98 



If we allow 10 days for the eighth (and probably last) to hatch out to the 

 adult state, and 2 days for complete maturity, that gives 110 days, from 

 copulation to copulation, or say 100 days for a complete life-cycle. 



Neither in nymphal nor adult states has Dindymus any appreciable odour. 



The adults and older nymphs seem entirely carnivorous, feeding on other 

 bugs, thin-shelled snails, lepidopterous larva? and pupae, &c. Mr. Kershaw has 

 also seen an adult, with its sette thrust into the hard ootheca of the Mantid 

 Hierodula saussurei,W. F. Kirby. In feeding, the bug often sucks without 

 using the labium at all ! In this case the bug constantly thrusts the seise in 

 and out of the body of its prey. 



The following text figure illustrates some of the methods of using the labium 

 while feeding. : — 



Fig. 1. Din- 

 dymus san- 

 <j u i ii e u s 

 sucking a 

 cockroach, 

 seta? wholly 

 within the 

 labium. 



Fig. 2. The 

 same at 

 another 

 time, the 

 labium 

 acutely an- 

 gled, seta; 

 partly ex- 

 posed. 



J.C.K. 



Fig. 



-j. The 

 same with 



the seta? uncovered between the angles of the labium. 



4. The bug using the seta? without the guidance of the labium. 



Fig. 



10 



