166 Journal New York Entomological Society. t Vo1 - xxvu. 



Collins, Colorado (C. R. Jones), and Murray, Utah (W. L. Bevon). 

 The species is remarkably constant on the whole throughout its range, 

 and there seems to be no tendency toward the formation of geo- 

 graphical races. 



3. Hippodamia lunatomaculata Motschulsky. 



Hippodamia lunatomaculata Motschulsky, Bull. Soc. Imp. Nat., Moscow, Vol. 



18, p. 382, pi. 7, fig. 8, 1845. 

 Hippodamia parenthesis in part of Crotch, Casey, Leng, Johnson, etc. 

 Subspecies or Varieties : 



Hippodamia apicalis Casey, Journ. N. Y. Entom. Soc, Vol. 7, p. 81, 1899. 

 Hippodamia parenthesis expurgata Casey, Canad. Entom., Vol. 40, p. 400, 1908. 



This species is distinguished from parenthesis by having the 

 posterior lobe of the theca strongly compressed beneath, its apex 

 truncate with a slender, median, unbarbed point. The writer has 

 examined specimens of this species from Tillamook, Wilsonville and 

 Forest Grove, Oregon (Creel and Rockwood) ; Salt Lake City, Utah 

 (P. H. Timberlake) ; Evenston and Lyman, Wyoming (E. J. Vosler). 

 A species as found in the lowlands of the Pacific Coast in California 

 and Oregon has been confused with parenthesis, as the elytral mark- 

 ings are practically the same, although there is some difference in 

 the thoracic markings as pointed out by Johnson. In the interior 

 and Rocky Mountain region it has become differentiated into a suffi- 

 ciently distinct geographical race or subspecies, described by Casey 

 under the name of apicalis. Casey's expurgata on the other hand 

 seems to the writer to be hardly more than an individual variation, 

 although it may possibly have become stabilized in some restricted 

 localities. A fairly large proportion of the specimens from Tilla- 

 mook, Oregon, are of this variety, the rest being typical lunatoma- 

 culata, with intermediate forms. 



The writer has crossed parenthesis from Utah with lunatomaculata 

 from Oregon and has found the union perfectly fertile in all cases. 

 The genitalia of the resulting offspring is almost exactly intermediate 

 between those of the parent species. Although the range of these 

 two species overlap considerably in the Rocky Mountain region there 

 is no evidence to show that they thus interbreed in nature. Since 

 male Hippodamia are not at all adverse to mating with any female 

 they find, even if belonging to another species, it would be too much 



