328 Mr. A. G. Butler on neio Spirostrepti. 



blue tints in parts. The sculpture is peculiar, consisting of 

 very dense extremely fine punctuation on a wrinkled surface, 

 with small punctures scattered over the more raised intervals. 

 Viewing the insect laterally, there is a whitish pubescent line 

 below the eye, continued along the flanks of the thorax and 

 onto the metathoracic epipleura. The legs are thick, and the 

 femora much inflated, more or less clothed with pale grey pile. 



XXXIIT. — Descriptions of some 7iew Species of Mifviopoda of 

 the Genus Spirostreptus from Madagascar, ^y Arthur G. 

 Butler, F.L.S.,r.Z.S.,&c. 



The species here described were obtained at Ankafana, Bet- 

 sileo country, by the Rev. Deans Cowan. 



1. Sjn'rostreptus Cowani, sp. n. 



Black, with the head, antennse, nuchal plate, legs, preanal 

 and anal segments, and a transverse dorsal band on the front 

 of all the other segments bright red. 



Body long, smooth, but not polished, very slightly attenua- 

 ted in front and behind; head large, semicircular when seen 

 in front ; clypeus bilobed, the lobes rounded, scarcely sepa- 

 rated, excepting by a small conical notch in front, on each 

 side of which is a single puncture, smooth. Antennte with 

 rather short joints, excepting the second, which is half as long 

 again as the third, the latter being slightly longer than the 

 remaining joints, smooth, cylindrical, the first to fifth attenu- 

 ated towards the base, with a few scattered bristles, increasing 

 in number towards the sixth joint, which is rather densely 

 setose and of a shcrfc oval form ; the seventh joint is a mere 

 terminal button ; ocul ;r plates semicircular, transverse, com- 

 posed of six transveise and five or six oblique facets; nuchal 

 plate with a lateral indentation in front near to the margin, 

 but not extending into the dorsal region, terminating on each 

 side in an obtusely triangular lobe, feebly striated along its 

 inferior margin ; second segment much prolonged below, 

 deeply depressed above the anterior border, coarsely rugulose 

 striate, remaining segments up to the preanal one finely ani 

 sparsely reticulate-striated, excepting at the sides, where the 

 striation becomes deeper and denser, divided into two parts by 

 a deep depression just beyond the middle, behind which they 

 are very distinctly tumid ; preanal segment terminating above 

 in an obtuse angle, its lateral margins being oblique and very 

 slightly concave ; preanal plate transverse, elongate-triangu- 

 lar, obtusely keeled in the centre, and with an obtuse terminal 

 angle ; anal plates broadly and obtusely carinate at the mar- 



