168 Journal New York Entomological Society. [Vol. xxvu. 



Posterior lobe short and thick or about one-half as long as the basal part 

 of theca, its dorsal surface plane except on the apical part where it is 

 slightly convex ; the lateral margins parallel until near the apex, where 

 they abruptly converge and meet in an acute point ; the under surface 

 not compressed and provided with a short, rounded membranous flap 

 on each side near the base, which usually projects so as to be visible in 



dorsal view 7. lecontei Mulsant. 



5. Posterior lobe of theca rather narrow, with subparallel margins arcuately 

 converging near apex which is produced into a short, rather slender 

 process ; the dorsal surface of lobe somewhat convex, the under sur- 

 face depressed ; the dorsal, subapical flaps of sdeagus obliquely truncate 

 at apex, the apical portion of sedeagus about twice as long as the flaps. 



8. convergens Guerin. 

 Posterior lobe of theca wider than in convergens, the lateral margins as 

 seen from above moderately arcuate, the apex produced into a rather 

 long, slender process ; the dorsal, subapical flaps of ffideagus rounded at 

 apex, the apical portion of sedeagus about one-half longer again than 

 the flaps 9. moesta Leconte. 



4. Hippodamia sinuata Mulsant. 



Hippodamia sinuata Mulsant. Species des Coleopteres trimeres securipalpes, 



p. 101 1, 1851. 

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

 Subspecies or Varieties : 

 Hippodamia spuria Leconte, Proc. Acad. Nat. Sci., Philadelphia, vol. 13, p. 



358, 1861. 

 Hippodamia complex Casey, ibidem, p. 80. 

 Hippodamia crotchi, Casey, ibidem, p. 80. 

 Hippodamia americana Casey (not Crotch), ibidem, p. 80. 



This species is decidedly variable and it is divisible so far as it 

 has been studied by the writer into three well-marked subspecies. 

 One, the typical sinuata (trivittata Casey) is found in the marshes of 

 San Francisco Bay and along the Sacramento River in California. 

 The second is the Oregon race described by Leconte as spuria, dis- 

 tinguished by the heavy, more or less transverse postmedian spots 

 and the expanded sutural spot. Crotchi and complex of Casey seem 

 to be individual variations connecting with typical sinuata, as no 

 proof has been advanced to show that they have become established 

 races. The third race is that found in Utah and Colorado, dis- 

 tinguished from spuria by the paler coloration, being generally 

 suffused with yellowish in life, the scutellar spot narrow and often 



