270 THE CANADIAN ENTOMOLOGIST. 



two basal foveae connected by the posteriorly cuspid transverse sulcus ; 

 elytra scarcely as long as wide, almost twice as wide as the prothorax, the 

 sides rounded, the humeri distinct, the sulcus obsolete at or a little before 

 the middle ; surface punctured apically, the basal foveae three in number; 

 abdomen distinctly narrower than the elytra and not quite as long, very 

 declivous posteriorly as usual, the basal segment with two slender parallel 

 carinae separated by almost half the total width and extending somewhat 

 beyond the middle of the segment, the second segment with two similar 

 though slightly smaller carinae. Male with the fourth segment extremely 

 short at the middle, the fifth short even at the sides, disappearing at the 

 middle, the sixth very large, punctulate, broadly flattened or feebly 

 concave toward the middle, the operculum of the seventh segment densely 

 punctulate, small, transversely oval and eccentric. Length, 1.25 mm ; 

 width, o 46 mm. New Mexico (Cloudcroft), Warren Knaus. 



This species somewhat resembles /^///^/w of the Pacific coast fauna 

 but is smaller ; it may be recognized at once by its peculiar coloration. 



Actiinn retracttijn, n. sp. — Smaller and much more slender and 

 depressed, polished, pale testaceous throughout, subimpunctate, the 

 pubescence inconspicuous ; head well developed for this genus, though 

 distinctly narrower than the prothorax, the widely-distant foveae united by a 

 feeble ambient sulcus ; antennae more slender though similar, the tenth 

 joint not quite so transverse, the eleventh more slender, conoidal, as long 

 as the five preceding ; prothorax relatively large, distinctly wider than 

 long, more strongly narrowed basally, the fovese and transverse sulcus as 

 usual ; elytra evidently though not greatly shorter than wide, scarcely 

 one-half wider than the prothorax, the sides arcuate, the humeri evenly 

 rounding, the sulcus traceable to the middle, the basal fovese three in 

 number; abdomen as long as the elytra and nearly as wide, less declivous 

 posteriorly than in the preceding, the first dorsal with two very short 

 carinules separated by less than a third the total width, the second without 

 visible carinules. Male with the first three ventral sutures straight from 

 side to side, the others strongly sinuate, the fifth segment shoit at the 

 middle, the sixth large and punctulate but scarcely more than flattened 

 medially ; the nearly flat operculum of the seventh is very large, sparsely 

 punctulate, slightly wider than long. Length, 1.2 mm.; width, 0.33 mm. 

 <???)• Queen Charlotte Islands, J. H. Keen. 



Allied to the ca?ididui7i, mari?ncum, pacificum group of the genus, 

 much more parallel in form and smaller than the typical species. 



