abstracts: entomology 231 



A bibliographic list of nearly 1500 books and memoirs dealing with the 

 Rotatoria is added. In nearly all cases this has been verified from the 

 originals and a reference given to the Washington hbrary in which the 

 publication may be found. H. K. H. 



ZOOLOGY. — Crustacean parasites of West Indian fishes and land crabs, 



with descriptions of new genera and species. Charles Branch 



Wilson. Proceedings of the U. S. National Museum 44: 189- 



277, pis. 18-53. April 3, 1913. 



The present paper consists of a general account of the parasites on 



fish, crustaceans, and ascidians obtained during a three months stay at 



the biological laboratory of Johns Hopkins University at Montego 



Bay, Jamaica. The parasites comprise isopods, copepods and ostracods, 



but only the last two groups are described in this paper. There are 52 



species of copepods, of which 31 are new to science. These belong to 



the genera Ergasilus, Bomolochus, Artacolax, Pseudoeucanthus, Taenia- 



canthus, Caligus, Dentigiyps (new genus), Anuretes, Paralebion, Ler- 



nanthropus, Sagum (new genus), Nemesis, Hatschekia, Lernaeolophus, 



Thysanote, Clavella, Brachiella and Cancrincola (new genus). 



The occurrence of an ostracod, Cypridina parasitica (new species), 

 on the gills of several kinds of fish is the first record of parasitism among 

 the ostracods. 



The illustrations are from drawings of the living specimens. 



Mary J. Rathbun. 



ENTOMOLOGY. — The remarkable life-history of a new family (Micro- 

 malthidae) of beetles. H. S. Barber. Proceedings of the Biological 

 Society of Washington 26 : 185-190, pi. 4. August 8, 1913. 

 Continuing work described in a preceding paper, the author records a 

 most remarkable life cycle for Micromalthus debilis — a cycle unparalleled 

 in our knowledge of insects and still incomplete in that the stages connect- 

 ing the adult to the paedogenetic form remain unknown. The observa- 

 tions have demonstrated (1) pluriviviparous and (2) unioviparous 

 paedogenetic reproduction and (3) the still unobserved normal, sexual 

 reproduction, all three types appearing in the progeny of single mother 

 of the first of these three types. Males develop from the single egg of 

 the second type of paedogenetic mother through three strange forms of 

 larvae (the second of these, or feeding stage, devouring the contents of 

 the abdomen of the mother through the vulva) ; females develop from 

 some of the progeny of the viviparous paedogenetic mother through the 



