16 Hayward on Boletotherus hifurcus. 



128. Larus aegentatus smithsoxiaxus. American 

 Herring Gull. Saw two specimens. 



129. Larus delawarensis. Ring-billed Gull. Shot 

 a single specimen. 



130. Larus Philadelphia^. Bonaparte's Gull. Saw 

 two pairs. 



131. Sterna forsteri. Forster's Tern. Ver\^ abun- 

 dant. 



132. Hydrochelidon lariformis sarin amexsis. Black 

 Tern. Common. 



133. Dytes auritas. Horned Grebe. Very common. 



134. CoLYMBUS TORQUATUS. Loon. \^ery abundant. 



ON THE SEXUAL CHARACTERS OF BOLETO- 

 THERUS BIFUPiCUS. 



By B. Hayward. 



Having recently been engaged in working over certain 

 genera of Tenebrionidce among which was Boletotherus, 

 I submit for publication the following observations on the 

 sexual characteristics of our only representative of th3 

 genus, Boletotherus hifurcus. A large series, comprising 

 many specimens of both sexes was examined. 



Besides the ordinary well-known sexual character of pro- 

 thoracic horns in the male of this species, I have been able 

 to find several others Avhich, so far as known to me, have 

 been hitherto undescribed. These are as follows: the fron- 

 tal carina of the mab differs from that of the female in 



