48 



PTSCHE. 



[March 1891. 



thread worm with tapering caudal ap- 

 pendage was noted. Occasional beetles 

 have been found affected with an Em- 

 pusa resembling E. grylli, a species 

 commonly known as a parasite of grass- 

 hoppers. An interesting bacterial dis- 

 ease of the larva reported by Prof. S. A. 

 Forbes at the Washington meeting of 

 entomologists is also to be mentioned 

 in this connection, though I have not 

 detected it here in Kentucky. 



Descriptions. 



■Egg. — Matured ova from ovaries of fe- 

 males are much like those of D. lotigicornis. 

 They are white, oval, with the surface retic- 

 ulated and sculptured so as to produce nu- 

 merous hexagonal, pitted areas. Prof. Forbes 

 gives the dimensions of the egg of D. longi- 

 cornis as .025 inch, by .015 inch. Ova of the 

 spotted species measure a trifle larger, being 

 about .027 inch in length by .016 inch in 

 greatest diameter. 



Fig. 1. Larva, enlarged. 



Larva. — Body cylindrical, tapering a 

 trifle towards the extremities, composed of 

 twelve segments behind the head. Skin 

 wrinkled, papillose along the sides, white, 

 sometimes becoming yellowish just before 

 pupation. Head dark brown, nearly black 

 in some examples, with a few rather strong 

 hairs arising from the surface ; a narrow 

 median longitudinal line of black above, and 

 two pale lines which converge from the bases 

 of the antennae, following sutures, to meet 

 at the middle line on the posterior part of 

 the head; ventral side of head pale medially. 

 No eyes. Antennae of three segments, 

 white. Labrum dark brown. Mandibles 

 dark brown, black at tips, with four or more 

 blunt denticles. Maxillae pale, armed with 



numerous strong spines within. Labium 

 pale. Cervical shield pale brown, with a 

 narrow median longitudinal white line, 

 broadly triangular in shape. Jointed legs 

 pale, each with a dark brown chitinous sup- 

 porting frame work at base; each segment 

 of legs provided with a number of strong 

 hairs; a single brown tarsal claw, beside 

 which arises a white, elliptical, striated plate 

 slightly longer than the claw. Dorsal shield 

 of posterior bod}' segment nearly circular in 

 Outline, brown, with numerous minute black 

 specks, slightly rimmed at posterior margin, 

 and in young examples obscurely bitubercu- 

 late; furnished with several strong marginal 

 hairs, and with four minute, striate, cen- 

 trally-placed, spatulate appendages. Spira- 

 cles round, the two anterior pairs sometimes 

 with brown rims, the rest pale. Posterior 

 segment with a single fleshy proleg. 



Length about .56 inch, diameter about .06 

 inch. Examples ready for pupation about 

 .37 inch long. 



Fig. 2. Pupa, enlarged. 

 Pupa. — Translucent white, with scattered 

 brown hairs on dorsal side of body arranged 

 as follows: one within, and a pair posterior 

 to, the base of each antenna; a transverse, 

 arched row near the anterior edge, a pair 

 near the middle, one at the middle of each 

 side, and one at each side near the posterior 

 margin, of the prothorax; four each on the 

 meso- and meta-thorax ; three at the extrem- 

 ity of each femur; a pair at the middle and 

 one at each side of each abdominal segment, 

 except the posterior three; antepenultimate 

 and penultimate segments of abdomen each 

 with six, the four inner being in pairs and 



