THE CANADIAN ENTOMOLOGIST. 175 



after the apical third ; the sulcus prolonged near the sides towards the 

 base, inclosing an elevated part (les trois festons de Rambur). 



Wings^smoky fuscous, the median and the anal veins darker, blackish ; 

 five longitudinal white bands ; four to five fine costals in the apical part; 

 two (in one hind wing, four) transversals in the cell. Legs brown, articu- 

 lations paler ; dilated in the usual way, so far as it can be observed, the 

 I St joint of tarsi not very much dilated. Abdomen brown, last segment 

 nearly cleft by a deep sulcus, nearer to the right ; appendages long, very 

 hairy ; basal joint longer than the last segment, apical joint longer and 

 thinner ; right spine long, slowly thicker towards the base ; tip sharp, bent 

 up a little ; this spine is turned strongly to the left, as long as the intro- 

 mittant, cylindrical tube ; the left spine is half as short, the sharp apical 

 end returned. I can not ascertain if there is any asymmetry of the 

 appendages. 



The description is made from three males, showing the smaller dimen- 

 sions, collected in Upper Egypt ; the fourth, a little larger and much 

 darker, collected near Cairo, is alike ; the end of the abdomen is not 

 visible. 



Female ? dry. Length of body lo mill. 



The two females before me differ from the males by similar characters 

 as O. Michaeli. The body is black, a little hairy, somewhat shining, 

 except the head, which is finely aciculate above. Head more rounded, 

 the eyes small, not prominent ; antennae (only 13 joints present) short ; 

 ist joint thicker, cylindrical ; 2nd very short, annular; 3rd longer, larger 

 at tip ; all the following alike, short, nearly globular ; the 2nd to 4th joint 

 a little paler than the others, which are blackish. Prothorax a little 

 broader than in the male ; mesothorax longer, narrower towards the pro- 

 thorax, without any traces of wings ; metathorax similar ; legs black, 

 articulations paler ; the enlarged parts, principally the basal joint of the 

 tarsus of fore legs, stronger developed and more enlarged. An external 

 spine on the basal joint is perhaps present. Abdomen longer, black ; last 

 segment rounded on tip ; the appendages thick, very short, the apical 

 joint a little longer ; the abdomen of these carded specimens can not 

 well be examined, but I believe that I am seeing a female genital opening. 

 I can not find any asymmetry. 



Hab. The larger winged male and the two females, called larvre by 

 Prof. Schaum, were collected by him on the island of Rhoda, near Cairo, 

 Egypt, end of January, 185 1, by beating the grass with the net in the 



