REPORT OF THE STATE ENTOMOLOGIST I913 



I 9 I 



nection with the strongly curved third vein. The adults reared 

 May 7 and 8th, 1907 are very erratic in behavior, flying con- 

 tinuously perhaps for 10 minutes and then refusing to take wing. 

 The pale salmon larvae were found in early May, under a hard, 

 black, carbonaceous fungus overgrowing a decayed oak stump. The 

 larvae were in cells and frequently folded so that the two extrem- 

 ities were approximate. 



Larva. Length 3 mm, slender, color pale salmon. Head rather 

 slender, with long, chitinous processes at the posterior lateral angles. 

 Antennae uniarticulate, the segment with a length four times its 

 diameter. Anterior margin of the first thoracic segment chitinized 

 and supporting the subquadrate, slightly bidentate, chitinous process 



Fig. 21 Lasiopteryx flavotibialis, ventral aspect of larval head 



(enlarged, original) 



resembling a small breastbone, from the base of which arises a 

 pair of long, diverging, chitinous prongs, all extending posteriorly 

 (fig. 21) ; breastbone well developed, bidentate, the shaft long, 

 slender. Skin nearly smooth. Posterior extremity broadly rounded, 

 the median apical portion thickly set with short, stout spines. 



Male. Length 1.25 mm. Antennae nearly as long as the body, 

 thickly haired, fuscous yellowish; 11 segments, the fifth with a 

 stem three-quarters the length of the basal enlargement, which lat- 

 ter has a length one-quarter greater than its diameter ; terminal seg- 

 ment with the basal portion greatly produced, nearly one-half 

 longer than that of the preceding, the distal part short, thickly 

 setose. Palpi; fuscous yellowish, the first segment short, stout, 

 subquadrate, the second one-half longer, the third about twice the 

 length of the second, more slender, the fourth a little longer than 

 the third. Face fuscous yellowish. Mesonotum fuscous, greenish 



