278 POMONA COLLEGE JOURNAL OF ENTOMOLOGY 



The genus Hypena Schrank, is the only one that is better represented 

 in CaUfornia than in the east. In this genus the primaries are narrow, 

 elongate, the outer margin squared or even a little angulated at middle, the 

 secondaries large, broad, without maculation of any kind. The palpi are 

 longer and projected more directly forward than in Boinolocha, and the species 

 look more like exaggerated Crambids than like any other noctuid genus. 



As all the species occur on the Pacific Coast, and humuU may yet be 

 found in Northern California, a synopsis of all the species may be given. 



Outer margin of primaries not angulated at middle humuli. 



Outer margin of primaries more or less outwardly bent at middle. 



Palpi not excessively long ; t. p. line with an outward bend in the sub- 

 median interspace dccorata. 



Palpi excessively long; t. p. line without outward bend or angle in sub- 

 median interspace. 



Base of ground yellow ; s. t. space yellow, size larger calif ornica. 



Base of ground gray ; s. t. space bluish gray ; size small inodcsta 



Hypena humuli Harris, is a dull brown species, tending to grayish, 

 without contrasting maculation and sometimes almost even in color. The 

 forewings are less parallel than the other species and the outer margin is 

 even, without trace of angle. The transverse posterior line is irregularly 

 sinuate and bent, outcurved over the reniform, with an outcurve in the sub- 

 median interspace, and an inward tooth on the internal vein. The larva 

 of this species feeds on hop, is of some economic importance, has been found 

 in British Columbia and Washington, and is more than likely to occur in 

 California if the hop vine occurs or is cultivated there. 



Hypena dccorata Smith, is the most brilliant species of the lot. The 

 ground color is a rich red-brown with blue relieving scales, and the maculation 

 is contrasting and generally well-defined. The palpi are stouter than usual and 

 distinctly shorter than in the other Pacific Coast species, and the angulation 

 in the outer margin of the primaries is less marked. The transverse posterior 

 line is even, a very little sinuated to the sub-median interspace, where it forms 

 an outward tooth, followed by one of equal length inwardly on the internal 

 vein. It thus differs from both of the following by the outward tooth above 

 the inward one. It is also a little the largest of the species, reaching 1.35 

 inches in expanse. 



As to localities they are very indefinite and the species is distinctly rare in 

 collections. 



Hxpcna californica ISehr, is a little smaller than dccorata and more 

 quiet in color. It is reddish or darker brown over a yellowish base; the pale 

 colors always yellowish, never bluish. The contrasts are as a rule well marked, 

 especially in the female. The palpi are very long, and the angle at middle 

 of outer margin of primaries is distinct. The t. p. line is characteristic; it is 

 almost upright, a little denticulated on the veins, without sinuation in the 

 sub-median interspace, but with a deep inward tooth on the internal vein. 

 This seems to be the most cnnimon .•mil widely distriliulcd of the Pacific 



