184 



PSYCHE. 



(June— July 1884. 



thoracic. Each commissure gives oil" a 

 nerve tliree and one-half millimetres 

 from the ganglion, going caudad. The 

 distance of these nerves from the gan- 

 glion varies however (fig. 11. o). 



5. The vagus nerve. — The vagus 

 ncn'c of Corydalus cornittus arises as 

 two nei^ves from the crura cerebri, dor- 

 sad of the labial nerves (fig. i\'. 9). 

 These nerves pass cephalo-mcsad, form- 

 ing two arches, and unite in a ganglion 

 on the median line dorsad of the palate. 

 This ganglion (fig. i. 3, fig. iv. 2) is 

 sometimes called the frontal ganglion, 

 and is immediately cephalad of the 

 supra-oesophageal ganglion. The va- 

 gus nerve departs from the caudad part 

 of the ganglion, passes caudad between 



the aorta and the oesophagus, and con- 

 tinues on the median line until it reaches 

 a point two millimetres caudail of the 

 frontal ganglion (fig. iv. 9). Here it 

 enters another ganglion smaller than the 

 frontal ganglion. This ganglion is also 

 situated on the median line between the 

 aorta and the oesophagus. Two nerves 

 depart from this ganglion, going latero- 

 caudad to the siiles of the oesophagus 

 (fig. I. 8, fig. IV. o). They continue 

 their course caudad until they reach the 

 pro-ventriculus, where they divide into 

 many branches. 



The vagus nerve gives blanches to the 

 aorta in the head, and numerous nerves 

 are continually given olVlo the ocsojiha- 

 gus. 



SEXUAL CHARACTERS IN THE CHRYSALIDS OF 

 INTERR OGA TIONIS. 



GRArTA 



RV MARY ESTHER MURTFEI-PT. KIRKWOOD, MO. 



The publication in Psvche for No- 

 vember-December 1SS3, V. 4, p. 103- 

 106, of the full text of Mr. Lintner's 

 interesting paper on "A new sexual 

 character in the pupae of some lepido- 

 ptera," reminds me of an observation 

 which I made last summer on the chrys- 

 alids of Grapta ifitcrrogationis. 



Desirous of obtaining fresh specimens 

 of this species., I i)laced about a dozen 

 elm-feeding larvae in a rearing cage, 

 from which, in due time, I obtained 

 eleven chrysalids. These were, in res- 

 pect to color and ornamentation, of two 

 distinct sorts. The larger proportion 

 were of a dull, pale fuscous with darker 



brown lateral stripes, dots and mark- 

 ings, without a trace of metallic orna- 

 mentation, while four were mucii paler 

 in general color, inclining to golilen 

 brown, each ornamented with llie eight 

 brilliant, pale-golden, papillose dorsal 

 spots by which this chrysalis is usualU 

 characterized. From each of the pale 

 and gilded chrysalids emerged a female^ 

 while the seven dark and unornamcnted 

 ones gave forth males exclusively. 

 This observation may be a mere cor- 

 roboration of a well known fact con- 

 cerning the sexual characters of the 

 species, but if so I have not met with it, 

 or it has entirely escaped my memory. 



