STEUCTUEE AND LITEEATUEE. 31 



New Mexico, in the latter region not without risk 

 of his life from the Apache Indians. 



In classifying the Noctuidse the following cha- 

 racters have to he observed. The structure of the 

 antennae, which, in the males, are often pectinated, 

 or have brush-like surfaces beneath. The presence 

 or absence of ocelli, situate behind the antennae 

 near the margin of the compound eyes, must be 

 ascertained. The surface of the compound eyes is 

 either studded with hair or naked ; the rim of the 

 eye is fringed sometimes with longer hair-like scales. 

 The clypeus between the eyes is flat or bulging ; 

 again, it is horned or furnished with a pit or de- 

 pression. The tongue is usuallj^^ long, but some- 

 times weak and short. The labial palpi are subject 

 to some variation in the comparative length of the 

 joints and their vestiture. The tibise are either 

 spinose, furnished with prickles, or unarmed ; the 

 front tibiae are sometimes swollen, or, again, very 

 short ; the spurs on the middle and hind tibiae must 

 not be mistaken for these spines or thorns. In 

 addition the front tibiae exhibit a varied structure : 

 they have a simple claw-like spine at the extremity 

 (Oncocnemis and the Dicopid genera), or there are 

 additional smaller ones, as in the Heliothid group. 

 Again, the joint is terminated by a tridentate ex- 

 tension of the tegument, as in Triocnemis, to speak 

 alliteratively. The vestiture of the body should be 

 examined under the microscope and its nature 

 ascertained. In Bryophila and Chytonix, as also 

 in Tar ache and Tamila, the scales are in part or 

 wholly flattened, not hair-like. Then the crestings 



