78 ENTOMOLOGICAL NEWS. [March, *o5 



By transmitted light, the dark band connecting the eye-patches with 

 each other and with the margin of the head as well as the dark anterior 

 margin of the mesothorax and all the parts of the remaing portion of the 

 body appearing brown by reflected light become deep blue. The termi- 

 nal segment of each antennae appears light blue by transmitted light. 



Antennae about three times as long as the head or one-quarter shorter 

 than the body without head and furcula ; relative length of the segments, 

 on the average, as follows : ■^^, ^^, -^j, ^^. 



Legs slender, of about the same length as the antennae, with tibiae con- 

 siderably longer than femora, each tibia bearing one long clavate hair 

 near the tip. Large claw of tarsus, bearing three teeth within, all on 

 the distal half, the one nearest the middle being much the largest, the 

 other claw unarmed and lanceolate. Dentes, as usual, in the genus, 

 serrate beneath. Mucrones provided with three teeth, a stout middle 

 and distal one and a very slender basal one, all acute pointed. Each 

 mandible with four teeth at the cutting tip and a many-toothed grinding 

 surface. 



On the surface of the body as a whole there are found three kinds of 

 hairs: first, small simple hairs which are scattered over the entire surface 

 of the body and all the prominent appendages except the dentes and 

 mucrones ; second, spinulose hairs which are apparently the only kind 

 borne on the dentes and mucrones, which surround the base of the manu- 

 brium and are found mixed with the simple hairs on its surface, and 

 which are also very sparsely scattered over the body, legs and antennae 

 being somewhat numerous about the bases of the latter and on thefrons ; 

 third, large hairs which appear truncate at the tip, being somewhat 

 thickly placed on the dorsum of the body, especially of the thorax, and 

 which are densly covered with hairs on the truncate surface and on the 

 side of the truncation. 



There seems to be considerable variation, according to instar, in the 

 relative lengths of the third and fourth segments of the abdomen. It is 

 difficult to state the typical size of an adult of this species ; it seems, on 

 an average, to be about 1.75 mm. in length. I have one specimen 2.25 

 mm. in length. 



Described from nine cotypes, three of which I have retained 

 and of the remaining six deposited three in the U. S. N. M. 

 and three in the collection of the Massachusetts Agricultural 

 College. 



This species has been found in considerable numbers under 

 the bark of the Sycamore throughout the year at Amherst, 

 Mass. The young were always present, but seemingly more 

 abundant during August and September. 



During the summer of 1903, I found a large number of 



