SUPPLE MEN! TO PSYCHE. 



IS 



U. S. Nat. Mils. (Collection Hubbard 

 & Schwarz) . 



I have seen several hundred speci- 

 mens, discovered by Mr. H. G. Hub- 

 bard in the dry pulp of Cereus gigaii- 

 teus. All the specimens came from a 

 single cavity in a decayed trunk, Decem- 

 ber, 1S96. 



This singular Scolytid is at once rec- 

 ognizable from the structure of the 

 thorax and the remarkable cephalic 

 armature in the male. Its affinities and 

 systematic position have, however, 

 remained obscure to me, and the eluci- 

 dation of these points must be left foi' 

 future studies. * Its food-habits and 



mode of development also deviate from 

 those of other Scolytidae. The dry 

 pulp of Cereus giganteus in which 

 this species lives is of a very peculiar 

 nature and resembles certain species 

 of hard Agarics more than a piece of 

 wood. This pulp is extremely hard 

 and brittle, and having examined seve- 

 ral pieces sent me by Mr. Hubbard 

 I fiiil to recognize any regularity or 

 system in the borings of the beetle 

 and its lar\a. Imagos, pupae and 

 lai'vae are to be found indiscrimi- 

 nately scattered in the irregular cham- 

 bers and galleries with which the 

 interior of the pulp is honey-combed. 



Classified List of Species Observed by H. G. Hubbard on the 

 Giant Cactus. 



BY E. a. SCIIWARZ. 



Hvmoiopteia. 



Polistes flaviis Cresson. 



Colcopteya. 



Dactylosternum cacti Lee, Pelosoina cap- 

 illosum Lee, Megasternum cerei Sz., Tyriis 

 elongatus Brend., Trimium puncticoUe Lee, 

 Eumicrus lucanus Horn, Maseochara semi- 

 veliitina Solsky, M. spacella Sharp, M. 

 puberula Casey, Aphelogossa nifipennis 

 Casey, unknown genus of Aleochaiinae, 

 Hotnalota sp. sp., Fa]agria sp., Oligota n. 

 sp., Xanthopygus cacti Horn, Belonuclius 

 epliippiatus Say, Xantholinus dimidiatus 

 Lee, Litiioctiaris tabacina Casey, Piiyseto- 



*Prof. A. D. Hopkins of Morgantown, W. Va., has 

 consented to make a thorough investigation of this Scoly- 

 tid. He has just now (February 13, 1S99) forwarded to 

 me a series of careful drawings illustrating the structural 

 details of Cactopinus, but I am unwilling to anticipate tlie 

 conclusions derived from his studies. Dr. J. B, Smith 

 has also kindly prepared sketches and microscopic slides 

 illustrating the mouthpartsand other details. 



porus grossulus Lee, Erchomus convexus 

 Er., E. punctipennis Lee, Omalium cacti 

 Sz., Trichopteryx sp. sp., Ditoma gracilis 

 Sharp, D. sulcata Lee, Bothrideres cacto- 

 phagi Sz., Ephistemus cactophilus Sz., 

 Attagenus hornii Jayne, Hololepta yucateca 

 Mais., H. cacti Lee, H. vicina Lee, Paro- 

 mahis opuntiae Lee, P. censors Lee, P. 

 gilensis Lee, Acritus arizonae Horn, Holo- 

 paramecus pacificus Lee, Alindria teres 

 Melsh., Lycaina discoidalis Horn, Clerid 

 larva (not bred), Monilema giganteum Lee, 

 Ulosonia marginata Lee, Cynaeus angustus 

 Lee, Platydema inquilinum Linell, Cacto- 

 phagus validus Lee, Apotrepus densicollis 

 Casey, Cossonus hubbardi Sz. , Cactopinus 

 liubbaidi Sz. 



Lepidoptera. 

 Melitara fernaldialis Hulst. Larva feed- 

 ing on decaying pulp of the Giant Cactus. 

 Imagos were bred by Hubbard and myself 

 at Catalina Springs, Ar., in April 1898. 



