ENTOMOLOGICAL CONTRIBUTIONS. 131 



traced. It buried in the ground the following day, and constructed 

 its cell of the usual ovoid form of the cells of the sphinges, at a depth 

 of four inches. The imago emerged the following June, enabling 

 me to determine the species, which the altered appearance of the 

 larva did not permit of doing. 



Pupa. Length one inch and three-fourths ; diameter one-half 

 inch ; color dark brown ; head-case depressed, shagreened ; eye-case 

 slightly prominent, with a smooth, impressed line inferiorly, and a 

 central one on the crescent, which is wrinkled transversely. Pro- 

 notum shagreened, quite depressed anteriorly, with a medial line ; 

 stigma fusiform. Mesanotum minutely shagreened, with an 

 inconspicuous medial line. Metanotum with a transverse line 

 anteriorly, posterior to which it is minutely wrinkled longitudinally. 

 Abdominal segments punctulated, and each divided superiorly in 

 about four parts by depressed transverse lines. Eleventh segment 

 with a dorsal, transverse, oval depression. Tongue-case buried, 

 reaching just below the tips of the middle leg-cases, having ante- 

 riorly a few transverse plaits near its medial line, arid a few longi- 

 tudinal, ones near the antenna-case. Antennae-cases in the female 

 extend to half-way between the tips of the anterior and the middle 

 leg-cases, showing the joints distinctly, with a granulation on each. 

 Anterior leg-cases broad, prominent and rugose over the femur. 

 Wing-cases somewhat granulated at their basal region, and smooth 

 elsewhere. Spine rugose, subtriangular, constricted at the base. 



As will be seen from the above description of the larva, it has no 

 structural affinity with that of Ceratomia quadricornis* The species 

 has therefore very properly been removed from the genus in which 

 Dr. Clemens had been led to locate it, from representations made to 

 him by one who claimed to have reared its larva repeatedly, and 

 described it as strongly resembling that of C. quadricornis. To Mr. 

 Grote belongs the credit of discovering structural differences in the 

 imagines of C. quadricornis and D. undulosa^ which differences are 

 fully sustained in their earlier stages. 



* Proc. Ent. Soc. Phil., 1862, vol. i, p. 290. 

 IProc. Ent. Soc. Phil,, 1865, vol. v, p. 190. 



