NOTES ON MYRIAPODA FROM LOANDA, AFRICA. COLLECTED BY 

 MR. HELI CHATELAINE, INCLUDING A DESCRIPTION OF A NEW 

 GENUS AND SPECIES. 



BY 



O. F. Cook. 



A small collection of Myriapocla presented to tlio National Muscnm 

 by Mr. Heli Chatelaine, formerly United States ('oninierci;il aj^ent at 

 St. Paul de Loanda, was entrnsted to uie for study by Dr. Kiley. This 

 material supplements that collected by the United States Eclipse Kx 

 peditiou of 1889 and 1890*, and makes necessary some emendation of 

 the former paper, including- the establishment of a new genus of lulidai. 



Spirostreptus variabilis Cook and Collins. 



Anii. N. Y. Acad. Sri., viii, 2S, PI. ii, Figs. 11-14 (189.3). 



A mature male agrees entirely with the description and figures 

 quoted. A female specimen 115 mm. long and with 55 segments has 

 the clypeus very coarsely rugose, Avith the depressions between the 

 antenna' not very apparent; the crescentic excavations lower down are 

 very well pronounced. There are four punctations in the upper ami 

 seventeen in the lower row; teeth very broad and blunt. Lower edge 

 of eyes slightly convex instead of concave. The eye form uke are, re- 

 spectively, 13+12+11 + 10 + 8+0+44- li=(>0 for the left eye, and 13 + 12 

 + 11+10+8+7 + 5=66, a variation not recorded in the former descrip- 

 tion. The surface of the segments are without ridges, but have occa- 

 sional very fine furrows. Anal valves scarcely wrinkled at base of 

 margin. The exposed parts of the anterior subsegment are, in alcohol, 

 yellowish buff". 



Another female specimen 85 mm. long" has 52 segments, the exposed 

 parts of the anterior subsegments reddish, the crescentic depressioiis 

 of the cly])eus not evident, while those between the antenna' are much 

 more apparent than in the other specimen. 



In the Eclipse P]xpedition Myriapoda there were eight specimens, 

 four males and four females, and there are thus eleven specimens of 

 this specaes in the Museum. 



* O. F. Cook and (i. X. Collins: The Myriapoda Collected by the I'nited State.s 

 Eclipse Expedition to West Africa. Ann. N. Y. Acad. Sci., viii pp. 22-40, PI. i-ill. 



ProteedingH National Muaeuiii, Vol. XVI — No, 968. 



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