chamberlin: west Indian chilopoda and diplopoda. 205 



138. Thyroproctus townsendi Pocock. 

 Journ. Linn. soc. London, 1894, 24, p. 506, pi. 37, f. 6-6c.i 

 Habitat. — Jamaica. (T. Townsend).^ 



139. Thyroproctus cinchonianus, sp. nov. 



Type.— M. C. Z. 4,416. Parafijpes.— M. C. Z. 4,417. Jamaica: 

 Cinchona, 5,000 feet. January, 1912. C. T. Brues. 



This, the second known species of this interesting genus, may be 

 distinguished from T. townsendi at once by the strikingly different 

 coloration. It presents along the mid-dorsum a continuous black 

 band composed of rather narrow trapezoidal marks, one on each seg- 

 ment. Each side of the median black stripe there is a series of smaller 

 ferruginous or red dots while below these the side is dark brown to 

 black in front of the suture, this region embracing numerous small light 

 dots or areolations, while the color caudad of the suture is solid but 

 lighter, commonly ferruginous. There is a black mark between the 

 eyes and extending down the labrum suggesting that on the face of. 

 Rhinocricus cocker dli. Legs flavous. Anal tergite black excepting 

 for a narrow flavous border. Anal valves also black excepting narrow 

 flavous margin. Collum with a black mark on anterior border. 



The head differs from that of T. townsendi in having the sulcus 

 clearly marked and extending to the margin of the labrum excepting 

 for an interruption near the level of the antennae. 



Collum weakly margined below, not attaining lower edge of second 

 tergite. With a single stria on each side at level of eye. 



Posterior suture obscure above pore; the anterior suture very deep, 

 curving widely opposite the pore considerably below which it takes 

 its origin as in T. townsendi. Posterior border of segments elevated 

 as in that species. 



The anal scutum convexly though only rather weakly bowed caudad, 

 being obviously longer at the middle than at the sides. Anal sternite 

 strongly elongate transversely, thickened, the anterior and posterior 

 margins parallel. 



Number of segments, thirty-seven or thirty-eight. 



liCngth, 30 mm.; width, 3.2 mm. 



