MTSOEIA. 255 



coloured hairs, is somewhat cylindrical in shape, and tapers towards each extremity ; 

 head cordate, and very large in proportion to the size of the larva, and of a brick- 

 red ; general colour reddish brown, with well-defined segmental rings of a deeper hue, 

 and narrow black, yellow, and reddish perpendicular lines on each segment; under 

 surface, claspers, and prolegs light red. When full fed it spins a loose network cocoon 

 between chinks of bark and therein turns to a light red pupa with many segmental 

 black spots, and covered with fine white down, and a purplish powdery bloom. The eyes 

 are black and very prominent. The butterflies emerge in about three or four weeks." 

 The genitalia of the male have a very strong spine with a broad base on the dorsal 

 edge of the harpagones, and some smaller spines towards the extremity. The tegumen 

 divides at the extremity and has a long lateral spine on either side, which, arising 

 from the base, is directed at first downwards, then abruptly upwards, and finally forwards. 

 (See Tab. LXXIII. fig. 17.) 



2. Mysoria afiinis. (Tab. LXXIII. figg. 19, 20, 21 s .) 



Pyrrhopyga affints, Herr.-Schaff. Prodr. Syst. Lep. iii. p. 57 x ; Scudder, Rep. Peab. Ac. Sc. vi. 

 p. 67 (1871) 2 . 



Alis nigricanti-chalybeo-viridescentibus, ciliis late albis ; posticis purpurascentioribus : capite postico, palporum 

 triente basali et abdominis apice coccineis purpureo tinctis ; fronte, capite summo et palporum apicibus 

 cbalybeo-cyaneis : subtus ut supra, sed viridescentioribus, posticis margine costali et margine externo fere 

 ad angulum analem cum linea laterali corporis utrinque et lineola postoculari luteis. 



Hab. Mexico, Mazatlan (Scudder 2 ), Presidio cle Mazatlan (Forrer), Acapulco, La 

 Venta in Guerrero (H. H. Smith), Guerrero (W. Schaus). 



Dr. Staudinger has kindly lent us the type of this species described by Herrich- 

 Schaffer, and we find several specimens in our collection from various parts of Western 

 Mexico which agree with it in all essential points, but the wings, especially the 

 primaries, are rather more elongated and the outer margin more concave. 



The species is nearly allied to M. amra, both having the same narrow orange margin 

 on the underside of the secondaries, but the several points of distinction mentioned in 

 the description of M. amra clearly show that the two insects are specifically different. 

 They both occur in the same region in Western Mexico, but M. affints appears to 

 spread a little farther to the northward and M. amra goes farther south. 



The male genitalia have the tegumen somewhat similar to that of M. venezuelce, but 

 the lateral spines run directly upwards from the base and terminate abruptly in a 

 short point directed forwards. The harpes are without the spines on the middle and 

 on the extremity of the dorsal edge. (See Tab. LXXIII. fig. 21.) 



3. Mysoria amra. (Tab. LXXIII. fig. 18.) 



Pyrrhopyga amra, Hew. Ex. Butt., Pyrrhopyga, iii. t. 3. ff. 16, 17 1 ; Math. Eot. Monthly Mag. 

 xix. p. 18 \ 



P. affini similis, sed capite postico fronte concolori, linea laterali corporis utrinque coccinea nee lutea et lineola 

 postoculari alba nee lutea distinguenda. 



, 



