114 THE CANADIAN ENTOMOLOGIST. 



The species varies in colour froiii dull green to black. There is also 

 considerable variation in markings, some specimens being almost 

 immaculate. 



C. /epida, Dej. — Only found on drifting sand planes, on sand, 

 which they very closely resemble in colour. This is the weakest flier of 

 any Manitoba tiger-beetle that I have collected, and towards the end of 

 their season, at about the time when eggs are being deposited, the females 

 make no attempt to fly, but are obliged to trust entirely to their running 

 l)owers as a means of escape. They are usually found on the sunny side 

 of a drifting sand-bank, where they get blown by the wind. 



Lepida appears late in June, and is most numerous in July. It 

 disappears towards the end of August. I have only once found it at all 

 plentiful. 



NOTES AND DESCRIPTIONS OF MEMBRACID^. 

 by c. f. baker, estacion agronomica, santiago de las vegas, cuba. 



Centrotid^,. 



Gerridius abbreviatus, n. sp. 



Length, 4.5 mm., male. General form and colour of G- scutellatus, 

 but differing widely m the following characters: Legs mostly piceous ; the 

 scutellar protuberance directed somewhat forward instead of backward ; 

 marks of tegmina arranged in the same pattern, but the oblique band at 

 the middle of tegmina very broad and heavy, being three times as broad 

 at middle of tegmina as at ti]) of clavus ; tegmina with apical margin 

 entirely fuscous, the larger spot at outer tip much broader than long. The 

 most distinctive character lies in the form of the tegmina, which are much 

 shorter than in G. sci/tei/atus, the middle apical cell being two-thirds the 

 length of the second discoidal cell, the same cell in G. scutellatiis not 

 being one-half of second discoidal. 



I collected this interesting species at San Marcos, an Indian pueblo 

 well up in the western coast range of Nicaragua. 



Ischiwcentrus niger, Stal. 



'i"he small dark males and the larger paler females (originally described 

 as /. fcrrughiosiis. Stal.) 1 found not uncommon at San Marcos, Grenada, 

 and Cliinandega in Nicaragua, these points all being far north of the 

 records given in l-Jiol. Gent. Amcr. 



SMii.irn.'K. 



Cyrtolobus Vandiizci, Godg. 



This species was formerly described by Goding under the genus 

 Smiiia^ a genus noted especially for the great elevation of the pronotum 



April, 1907 



