J. CHESTER BRADI.EY. 145 



petiole white; another has the first five joints of tiie antennje ami 

 the front and middle legs brown, the trochanters and apex of petiole 

 white, and the upper part of the thorax i-ed ; another the scape, 

 lower part of the face, and upper part of thorax red, and the front 

 legs brownish ; two others have the upper part of the thorax red, 

 and the apex of the petiole white. 



In the " Canadian Entomologist," vol. xxxiii, p. 304, Dr. Ash- 

 mead states that he has recently recognized Evunia unicolor Say as 

 distinct from appendig aster, differing in punctuation. From the 

 labels on his specimens it is evident that he refers to the northern 

 or black form of this species, semieoda, which differs veiy markedly 

 from appendig aster, but very certainly belongs here and not to 

 Evan'm. In the "Canadian Entomologist," vol. xxxvii, p. 64, 1 

 state in speaking of Evaniella, "Here also belongs and stands as 

 type the species which Dr. Ashmead calls unicolor Say, but is not 

 that species. Say's description applies to E. appendig aster, which 

 could easily have spread into the interior with the early settlers, 

 inasmuch as it is parasitic on cockroaches." 



After receiving a letter from Dr. Ashmead assuring me of his 

 conviction as to the correctness of his determination, I looked over 

 the matter as^ain and came to the conclusion that he was right, and 

 so wrote to him. Inasmuch as there was doubt concerning the 

 identification, and since the type was destroyed, it seemed to me 

 right to follow^ his determination. But recently it has seemed to 

 be so impossible to identify the specimens in question with Say's 

 description, that I have decided to follow my former course and 

 describe it as new, leaving Say's unicolor as a synonym of appendi- 

 gasler, or as a species which has not since been collected and which 

 may yet come to light. I follow this course with great regret, not 

 only because I do not wish to add unneccessarily to nomenclature, 

 but because could I conscientiously do so, I should prefer to follow 

 the judgment of an entomologist as experienced as is Dr. Ashmead. 



Say's description oi unicolor is as follows, the italics are my own : 



■' Entirely black, immaculate, slightly sericeous. Inliahits the Uniterl States. 

 Antennae as long as the body ; palpi piceous; thorax with verii few small punctures ; 

 melathorax [propodeum] densely punctured ; wings liyaline, nervuies fuscous : 

 n distinct nerviire passes from the dividing nervure of the cnhital and discoidul cellules 

 to the posterior margin of the wing: abdomen much compressed; inipunctured. 

 polished oval, ratiier longer tiian the petiole; posterior feet elongated. Lingth 

 more tlian three-tenths of an inch. 



TEANS. AM. KNT. SOC. XXXIV. (19) APRIL. 1908. 



