572 PROCEEDINGS OF THE NATIONAL MUSEUM vol. m 



The reasons for synonymizing the generic names of Stenocoris 

 Signoret and Dallasia Bergroth were given above, both having been 

 preoccupied. 



Colobophrys Horvdth is here relegated to synonymy because the 

 genotype presents no features which the author considers to be of 

 generic importance for separating it from Dallasiellus. In fact, 

 Colobophrys is here considered to be the same as the nominal subgenus. 

 Horvdth had pointed out that he considered his genus to be close 

 to Macroscytus to which it was related by the "marginatis pronoti 

 postice abbreviatus." Actually this statement was misleading not 

 only to the reader but also to Horvdth himself. In none of the 

 specimens of Cydnidae examined by the author, not even Macroscytus, 

 has there been any shortening of the lateral pronotal margins. In 

 Macroscytus the posterior part of the lateral pronotal margin is 

 evanescent and hidden from dorsal view by the laterally swollen 

 umbones; but nevertheless, it does extend to the posterior margin of 

 the segment. Horvdth based Colobophrys on a new species, C. 

 solitaria, which he described from a single female. Through the 

 kind cooperation of Drs. Soos and Halaszfy, of the Musee d'Histoire 

 Naturelle de la Hongrie, this type was made available for study. 

 In this type, as well as in other specimens of the species, the lateral 

 pronotal margin is evanescent posteriorly but is visible for its full 

 length because the umbones are not swollen laterally. The evanes- 

 cence of the posterior part of the lateral margin results in the greatest 

 pronotal width being distinctly antebasal. This latter situation also 

 is evident in D. californicus and to a much lesser degree in the new 

 species Dallasiellus puncticeps. D. puncticeps and D. solitaria agree 

 in one feature, the coarsely rugopunctate cephalic punctation, which 

 sets them apart from all other members of the genus. But surely 

 this cannot be interpreted as being of generic value in any part of the 

 Cydnidae because this extreme as well as the opposite and all inter- 

 mediates occurs in many parts of the family. Horvdth did not know 

 the male of his lone species of Colobophrys so he was unable to point 

 out the sexual dimorphism that occurs in Dallasiellus solitaria. The 

 males differ markedly from the females in possessing a peculiar, 

 submedian emargination in the lateral pronotal margin. This emargi- 

 nation is marked by a peculiar "fold" which appears to send an oblique 

 furrow mesally, as shown in the illustration of the male pronotum 

 of D. americanus (fig. 78). If this pronotal "fold" is beheved to have 

 value as a generic indicator, these two species must be grouped together 

 in one genus. But the present author cannot bring himself to agree 

 with establishing genera in the Cydnidae on secondary sexual charac- 

 ters, preferring to believe that the presently offered generic arrange- 

 ment, based primarily on modifications of the osteolar peritreme and 



