COLEOPTERA. 133 



minutely strigcato-reticulate, finoly evenly and rather closely punctate, more 

 sjiarsely so toward tip. Legs long and slender; first joint of the posterior 

 tarsi nearly one-half longer than the second, very much sliorter than the 

 last. Prosternum very strongly and acutely carinate between the coxae. 



Female. — Second ventral segment with a tmnsverse feebly spongy fold just 

 behind the middle, nearly straight and one-sixth as long as tlie segmental 

 width, densely fimbriate with fine black setae ; third segment having just 

 before the middle a similar fold, or more properly, narrow eroded and black- 

 ish-granulose area, which is slightly shorter than that of the second segment ; 

 sixth segment truncate at tip, truncation extremely feebly sinuate in the 

 middle, angles rounded. 



Length 10.0 mm. 



Willets Point, Long Island, 2. 



Each dor.sal segment bears near the apex and just within the 

 border a long stiff erect black seta. This species should probably 

 follow the preceding in the catalogue ; it is distinguishable from it by 

 its sexual characters, and the more slender form, paler color and more 

 parallel and straight sides of the head in parallelum. Between the 

 eyes there is a narrow transverse area which is almost free from 

 punctures. 



The species of Cryptobium must be extremely numerous in the 

 New World ; as far as my own experience will allow me to judge they 

 are never gregarious and always found singly, and are comparatively 

 seldom taken. Of the five species in my own collection one has been 

 described and four are now described for the first time, if the char- 

 acters given by Dr. LeConte are constant and accurate. Another 

 specimen from Willets Point, which has been unfortunately destroyed, 

 evidently represented a species excessively closely allied \o proximum, 

 in which the fold of the second segment was similar, but which was 

 entirely devoid of any modification of the third segment. The speci- 

 men was so very similar to the type of proximum, only differing in 

 the slightly greater convergence of the sides of the pronotum toward 

 the base, that I am almost inclined to doubt the invariability of the 

 sexual characters. 



LATHROBIUM Grav. 



L<. tricolor n. sp. — Form somewhat slender, rather strongly depressed. 

 Pubescence of head prothorax and elytra in the form of very coarse erect 

 sparse setae, of a very dark piceous color, that of abdomen very fine, long, 

 recumbent, and extremely dense and even, very pale grayish-brown. Head 

 small, from base of antennae about as long as wide ; eyes rather large, 

 slightly oblique and slightly prominent, one-half their length from the bases 

 of the antennae; sides behind them parallel and feebly arcuate ; posterior 

 angles rather acutely rounded; base truncate, feebly sinuate in the middle ; 



