June, 1909.] Ohio Forms of the Genus Lepidocyrtus. 533 



Still smaller individuals than the above have been found and 

 it is believed that 0.20 mm. would be a good average for the length 

 of freshly hatched larvae. 



One week after the larval forms were first noticed the insects 

 averaged 0.40 mm. in length, an increase of not quite 0.10 mm. 

 The eves were still not visible. 



Tliree weeks later the average length was 0.55 mm. When 

 the forms showed little change other than an increase in size. 

 One specimen, however, was covered with drops of moisture as 

 if just ready to molt. In a short time the skin split along the 

 mid-dorsal line of the thorax, and the old skin was cast off. For 

 the first time in the life of the now probably five week's old 

 larva the ver}- minute, red, bead-like eyes were visible at the 

 sides of the head at the bases of the antennae. In other words, 

 twentv-eight days had elapsed after the larval forms of 0.32 mm. 

 were first observed before there was any sign of eyes. The 

 forms were now positively identified as L. sanguineus. 



From the appearance of the eyes of L. sanguineus until the 

 adult stage is reached the growth is very slow. Nearly four 

 weeks after the appearance of the eyes the average length of the 

 specimens was 0.7 mm., which may be considered that of the 

 adult form, 



The following table will show in brief the relative growth of 

 the insects from the larval to the adult stages: 



AVERAGE LENGTH 



OF INSECT. EYES. 



March 25 0.32 mm. Absent. 



April 1 0.40 mm. Absent. 



April 22 0.55 mm. Present. 



May 4 0.575 mm. Present. 



May 19 0.70 mm. Present. 



Specimens of the above species have been kept alive in 

 artificial cells for over ten weeks, but we can not say at present 

 just how long the life of the average individual may be. 



Lepidocyrtus Luteus n. sp. PI. XXXI. 

 (Description taken from living and mounted specimens.) 



Color: a light bronze or clay color, with iridescent scales reflecting 

 shades of blue and pink. Antennae: I short; II twice as long as I; III 

 shorter than II; IV not quite so long as II plus III. Eyes: black, eye 

 spot much elongated, very characteristic in the arrangement of the eight 

 ocelli. A prominent fringe of clubbed hairs on the mesonotum. An 

 extreme type of Lepidocytrus in the strongly projecting inesonotum, 

 which coines to a decided point over the head, nearly concealing the head 

 beneath it. Barbed hairs are found on various parts of the body, scat- 

 tered over the spring, abdomen and legs. Legs: with two claws, both 

 curved in the same direction ; the larger unusually broad and bearing two 

 teeth, the smaller very slender. Abdomen long and slender; IV about 

 seven times as long as III. Spring: manubrium shorter than dentes; 

 dentes sub-annulated ; mucrones as usual, with two hooks, and a long spur 

 extending from base to opposite ante-apical hook; long barbed hairs 

 extending to tip and beyond mucrones. Length, 1-1.5 mm. 



