ing a broken lateral ridge. The other segments bear but a single fold and 

 no spiracles. 



The thoracic region bearing the legs exhibits indistinct sutures and folds 

 presenting but a faint resemblance to analogous parts in other Coleoptera, 

 and yet is strongly of the Lampyrid type. 



Legs of the Lampyrid type, four-jointed, and, like females of the group, 

 have a short obtuse tarsal claw. 



This is a handsome insect when living, and is the most brilliant "glow- 

 worm " known. The light appears most intense on the cross margins of 

 the dorsal plates, but the luminosity is also strong on all the margins, as 

 well as along the lateral edges. Sometimes the insect appears checkered 

 by being banded with phosphorescence. 



.There are some more facts to learn about this peculiar insect. Why the 

 larva should be luminous, and yet have nothing to attract; and why the 

 adult female should be luminous, while the male is not nocturnal, but 

 roams in the sunlight. The habit of the 'male is to appear on the wing, in 

 temperate heat, from 9 A. M. to 4 p. M., but during the hottest weather it 

 does not appear until the sun is declining. 



Perhaps there is yet to be discovered another form of the female, without 

 luminosity, and perhaps more perfect in its parts, and non-luminous. 



Some more questions are: What are the differences in the larval form 

 of the sexes, or, are there any larval differences of the sexes? The answers 

 to these queries will only come after observations; but the answer to the 

 one concerning the luminous character may give way to theory, and it may 

 be suggested that the luminous quality is inherited, and though without 

 use in this species because of the diurnal habit, yet may be a derived char- 

 acter that is only of use when the habit of the insect is nocturnal. But it 

 must be considered that the plumose antennae of the male would indicate 

 that it seeks its mate by scent. 



This species is in no sense an injurious insect, but, on the contrary, may 

 be considered as beneficial to agriculture, having an entirely carnivorous 

 habit. 



A NEW SPECIES OF CALIFORNIAN COLEOPTERA. 



By J. J. RIVERS, Curator of Museum, University of California. 



BBADYCINETUS, HORN. 



Bradycinetus Hornii, n. sp. 



Male: Form, robust, elliptical. Color, ferruginous 

 brown, shining; head, tips of armature, margins of pro- 

 thorax, and a spot near the outer margin of prothorax, 

 either dusky or black. Head: Clypeus transverse and 

 feebly angulate at the sides, the front edge 

 rising increasingly backward, until just be- 

 fore reaching the clypeal suture it ends in 

 a well formed tubercle on either side; be- 

 Male. hind the sutural line on the vertex is a 



very prominent, stout, conical horn; three fourths of the lower portion of 

 the horn and the whole of the frontal area finely rugose. Antennae: 

 funicle shining, chestnut; club paler, not shining. Thorax: subtriangular, 

 2 



