HYMENOPTEROUS FAMILY STEPHANID^. 827 



This may prove to be the male of D. leticodontus Schlett., also 

 from Sarawak, with which it agrees in the obsolete frontal 

 tubercle, short occiput, and veiy largely in sculpture. The round 

 flavous spots on third segment are very distinctive, and 1 do not 

 feel sure enough of the connection to unite them. 



DoiTBTFUL Species. 



The following species cannot be placed, in consequence of 

 defective descriptions : — 



Megischus canadensis Davis. 



Megischus canadensis Davis, Trans. Amer. Ent. Soc. xxiv. 

 p. 349 (1897), $ . 



" 5 , 14 mm., ovipositor 18 mm. 



" Black, with cheeks beneath and posterior tarsi dirty yellow ; 

 four anterior legs with tibi{\3, tarsi and apical trochanter, also 

 hind trocha,nters, pale piceous; wings hyaline, nervures and 

 stigma reddish-bi-own : the sculpturing is different from and 

 much finer than in the preceding species {M. fioridanus^ see 

 below), the head, including face, is circularly reticulate, very 

 finely so on the occiput ; prothorax coai'sely reticulate ; petiole 

 irregularly transversely wrinkled; five spines of the head are 

 mere transverse prominences and the anterior ocellus is in a 

 broad, rather deep basin ; guides of ovipositor broken. 



" One specimen from Toronto, Canada^ collected July 15th by 

 Mr. T. C. Priddey." 



Stephanus diadema Fab. 



Foemis diadema Tab. MSS. Type in Mus. Kilia?. 

 Stephanus diadema (Fab.), Westw. Trans. Ent. Soc. Lond. iii. 

 p. 277 (1843). 



" I am unfortunately unable to detei'nune whether this un- 

 described insect be specifially different from the last {S. bicolor) ; 

 the notes which I made at Kiel simply stating that the oenus 

 diadema of the Fabrician cabinet is a Stephanus with a red head." 



There appears to be no other reference to this species, though 

 the name appeai-s in all lists of Stephanidfe. 



Stephanus diversus Schlett. 



Megischtis furcatus Brulle, Hist. Nat. Ins. Hym. iv. p. 539 

 (1846); Westw. Trans. Ent. Soc. Lond. 1850-51, p. 228, 2. 

 Stephanus diversus Schlett. Berl. Ent. Zeit. xxxiii. p. 133 (1889), 



" Nigei-, alis fere f uscis, abdominis segmento secundo Ifevigato, 

 valvulis terebrae nigris. Fern. 



" II est noir, avec les joues roux et la base des mandibles d'un 



