54 Trans. Acad. Sci. of St. Louis. 



the dark-legged form of Sijnhalonia atriventris, but that 

 would hardly be described as having the pubescence of the 

 legs black. One could hardly account for the statement that 

 the pubescence of thorax was paler than that of the head, 

 nor for mistaking it for the $ of M, desponsa. Mistaking 

 M. desponsa $ and M. bomhiformis 5 as sexes of the same 

 thing will not seem very strange to any one who will place 

 them side by side. Also, from the statement that the apical 

 margins of the segments were sometimes rufo-testaceous, I 

 suppose that Smith mixed both sexes of the Emphor. At 

 any rate, I believe that the above synonymy will be verified. 



Synhalonia atriventris Sm. form fuscipes n. f. 



$. — Differs from the normal form {8, dubitaia Cr. $) in 

 having the tibiae and metatarsi, especially the scopae of hind 

 legs, fuscous or blackish. 



Synhalonia rosae, n. sp. 



2- — Closely resembles the preceding form, but is smaller, 

 the apical half of the second abdominal segment shining and 

 impunctate, the tibial scopa more nearly surrounding that 

 joint, less limited to the exterior of the joint. Length 

 12 mm. 



Carlinville, Illinois ; 3 $ specimens. 



Ceratina calcarata n. sp. (?) 



? Ceratina tejonensis Provancher, Faun. Ent. Can. 812. (^. 1883. 



Ceratina tejonensis Robertson, Trans. Am. Ent. Soc. 22 : 126. (^. 1895. 



Differs from C. dupla Say $, as far as I can see, only in 

 the hind femora being produced into a triangular tooth. The 

 maxillary palpi are six-jointed. Whether it is the male of a 

 distinct species or a dimorphous male of C . dupla I cannot 

 say, but I think the dimorphism has to be proved. Accord- 

 ing to Mr. Ashmead, C . tejonensis has the maxillary palpi 

 four- jointed. He makes it the type of a new genus, Zaodon- 

 tornerus. The name of the local insect is changed on the 

 presumption that Mr. Ashmead' s statements are corect. 



Neopasites illinoensis Rob. 



Phileremus illinoensis Robertson, Trans. Am. Ent. Soc. 18 : 64. 9d^' 189K 



