220 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 109 



nounced, while in australis they are mostly obliterated In the dorso- 

 lateral row, being more pronounced only at the base and at the tip of 

 the abdomen. 



The color of hackeri is slightly darker than that of australis, but 

 the pattern of the scutellum is the same. 



In hackeri the spu-acles of segments ii-vi are ventral, whUe those of 

 segment vii are dorsolateral. 



All other characters agree with australis. 



Proportions of hackeri, male, are as follows: head 38:38; antennae 

 7:8:7:12; pronotum 35:65; scutellum 50:85; abdomen 81:75. 



Size: Total length 3.0 mm.; width of pronotum 1.07 mm.; width 

 of abdomen 1.23 mm. 



Holotype: Male, Southport, Queensland, Australia, H. Hacker, 

 Jan. 26, 1929; deposited in the Drake Collection in the U. S. National 

 Museum. 



Remarks: This species is dedicated to Mr. H. Hacker, an Australian 

 entomologist who collected this as well as many other curious species 

 of Australian Ai'adidae. 



Genus Cclisiopsis Champion, 1898 



Calisiopsis Champion, 1898, in Godman and Salvin, Biologia Centrali-Americana, 

 vol. 2, p. 67. 



Type of genus: Calisiopsis ampUceps Champion, 1898. 



This genus was monobasic, with a single species, Calisiopsis ampU- 

 ceps Champion, 1898, described from Panama, though Champion 

 indicated that one of his three specimens, without head, probably 

 belonged to another species. 



In 1951 I received one specimen of Calisiopsis from the Rev. Pio 

 Buck, S. J., professor of the Colegio Anchieta, Porto Alegre, Rio 

 Grande do Sul, Brazil, and, somewhat later, I received some additional 

 specimens from Mr, Plaumann, Nova Teutonia, Santa Catarina, 

 Brazil. Although it was difficult to understand how a species with 

 such limited power of flight could be distributed in Central America 

 and southeastern Brazil, Champion's description fits my specimens 

 and I identified them as Calisiopsis ampliceps Champion. As the 

 male of Calisiopsis was unknown, I described it (Kormilev, 1956, p. 

 149). 



Among Aradidae from the U. S. National Museum I have now 

 seen four specunens of Calisiopsis from Mexico. Two of them fit 

 Champion's description and drawings and two do not, but they all 

 are clearly different from the Brazilian specimens. As a result we 

 have now three different species. Assuming that the specimens from 

 Tomazunchale, which fit the Champion's description and drawings, 



