68 INSECUTOR INSCITI^ MENSTRUUS 



an American derivative, considerably altered from the ancestral 

 type. A. muelleri Dyar, occurring in the mountains of Mexico, 

 has genitalia of piillatus and coloration of diantaeus, a synthetic 

 form. The following synonymy is given : 



Aedes diantaeus Hov^ard, Dyar & Knab. 



Aedes diantaeus Howard, Dyar & Knab, Mosq. No. & Cent. Am. 



& W. I., iv, 758, 1917. 

 Aedes serus Martini, Arch. f. Schiffs- u. Trop., xxiv, Beih. i, 

 96, 1920. 

 I have examined specimens of serus, received from Dr. 

 Martini, and can confirm the synonymy. No difference is 

 apparent in any stage between American and European 

 examples. 



Aedes pullatus Coquillett. 



Culex pullatus Coquillett, Proc. Ent. Soc. Wash., vi, 168, 1904 



Aedes acrophilus Dyar, Ins. Ins. Mens., v, 127, 1917. 



Culex jugorum Villeneuve, Bull. Soc. Ent. France, 1919, 58, 1919. 



Aedes metalepticus Dyar, Ins. Ins. Mens., viii, 51, 1920. 



Aedes gallii Martini, Arch. f. Schififs- u. Trop., Beih. i, 110, 1920. 



Edwards lists the European form as var. jugorum, but it 

 appears to me that the characters cited are without especial 

 value. The apparent stoutness of the claspette stem and basal 

 spine vary with the preparation, while the whiteness of the 

 mesonotal vestiture may be due to fading. I have seen old 

 specimens of American pullatus, caught on the wing, which 

 were almost as white as the specimens submitted to me by Prof. 

 Bezzi. This species seems unusually subject to fading even 

 during life. 



Aedes intrudens Dyar. 



Aedes intrudens Dyar, Ins. Ins. Mens., vii, 23, 1919. 



Mr. Edwards has seen a male of this species taken by H. 

 Loew in 1844, presumably in the Posen district of Germany. 

 The form must be very rare, for it has not reoccurred in recent 

 European collections. Mr. Edwards states that he cannot dis- 

 tinguish this species by coloration from pullatus or communis; 

 but this must be due to lack of familiarity with the insect. 



