381 



Syn. Spirostreptus collaris, Porat, Bih. Svenska Vet. Ak. Handl. 

 IV, n°. 7, p. 43 (1876). 

 „ „ javanicus, Porat, Ann. Soc. Ent. Belg. XXXII, 



pp. 207-210 (1889). 

 Java: Buitenzorg. 

 A number of examples were obtained varying in size from about 

 120 mm. to 40 mm. In the young and half-grown examples the pos- 

 terior terminal somites are relatively larger thao in the adults. More- 

 over the caudal process does not project beyond the anal valves in 

 examples of about 40 mm., while in those of about 70 or 75 mm., 

 it is shorter than in the adults. 



78. Thyropygus xanthonotus , sp. n. 



Java: Buitenzorg. A single female specimen. 



Q. Closely resembling the preceding but differing in colour, there 

 being on the posterior half of each segment a median dorsal yellow 

 spot, which anteriorly unites with a wide, more or less triangular, 

 rich yellow band occupying the whole of the upper surface of the 

 anterior portion of each somite. 



Moreover the lateral extension of the first tergite has its anterior 

 margin less thickened and the angle consequently less produced, and 

 the stria? finer. 



Length about 98 mm. 



79. Thyropygus rubro-limbatus , sp. n. PI. XXII, fig. 17 — 17 a . 



Sumatra: Padang. A single male example. 



Nearly allied to javanicus. 



Colour; head fuscous above, passing beneath into deep ferruginous, 

 segments piceo-olivaceous , the l 8t with red margins, and the rest with 

 red along the posterior border, the caudal process and borders of the 

 valves also red. Legs and antenna clear pale yellow. 



Head: with striate area conspicuous, distance between the eyes 

 rather greater than a diameter; antennœ just surpassing the collum 

 when extended laterally. I st tergite or collum extending inferiorly as 

 low as the 2 nd ; its posterior border lightly emarginate above the 

 posterior angle, close to which there are two or three deep abbrevia- 

 ted sulci , anterior angle obtusely convex , anterior border nearly straight. 



On the rest of the segments the transverse striae of the anterior 

 half extend from the sternum to the summit, but do not reach poste- 



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