532 The Ohio Naturalist. [Vol. IX, No. 8, 



bearing serrations which in ventral view appear as sub-annulations; 

 mucrones with two hooks, a spur at base extending out almost opposite 

 ante-apical hook, two long, barbed hairs arising from end of dentes, one 

 extending to end of apical hook of mucrones, the other some distance 

 beyond. Length .7-. 9 mm. 



This small white form is very active, and found commonlv 

 about Columbus in the cavities of old rotten wood, and among 

 the leaves and dirt. When feeding the head is barely visible 

 under the projecting mesonotum. It is easily distinguished as 

 a small white form, with the bead-like red eyes at the sides of 

 the head, and the short third joint of the antennae. The eyes, 

 however, soon lose their pigment in alcoholic specimens. 



This species is especially interesting as a Lepidocyrtus from 

 the fact that it possibly represents the connecting link between 

 Lepidocyrtus and the eyeless genus Cyphodeirus. Guthrie 

 records one species with five ocelli instead of the typical eight to 

 either eye patch (L. decemoculatus) and another (L. sexoculatus) 

 with but three ocelli to either eye patch. L. sanguineus, as the 

 two above named species, has every character of a Lepidocyrtus 

 with the exception of the rudimentary condition of the eyes. 

 When we consider the evidence of such reduction in the other 

 genera, we cannot but feel there is just argument in including 

 such forms with rudimentary eyes in this genus. Again when 

 we consider the gradation in the degree to which the mesonotum 

 projects over the head, and the difficulty in classifying the 

 specimens on this character in some instances, it seems but a 

 step to the genus Cyphodeirus in which the thorax projects but 

 little, and possibly even should be united in one genus. 



Notes on Life History of Lepidocyrtus Sanguineus, n.sp. 

 PI. XXX. — On May the twenty-fifth the larval forms of L. san- 

 guineus were first observed. They were found in colonies of eight 

 or ten individuals in the channels of decayed wood made by 

 wood boring larvae. Each colony probably represented the 

 offspring of one parent. The resemblance to the adult forms 

 was very striking, the apparent absence of eyes, and the larger 

 size of the head in proportion to the body being the only appreci- 

 able differences. In color the larvae are silvery-white to the 

 naked eye, the same as the adult, with iridescent scales, and 

 very active. The relative proportions of these larvae when first 

 observed may be seen from the following measurements: 



LARVA. ADULT. 



Total length of insect 0.32 mm. .9 mm. 



Width of body 0.09 mm. .IM) mm. 



Length of antennal segments 1 0.02 mm. .04.") mm. 



II 0.03 mm. .00.3 mm. 



III... 0.27.3 mm. .055 mm. 



IV... O.OCia mm. .n5 mm. 



Total length of spring 0.17 mm. .5 mm. 



Width of head 0.10 min. .2 mm. 



Length of head O.OS mm. .10 mm. 



