CYDNIDAE OF THE WESTERN HEMISPHERE — FROESCHNER 465 



the "Guayaquil" locality appears to be in error. The Mexican 

 locality is included within the presently determined range of the sub- 

 genus. Assuming, at least temporarily, that Signoret's determination 

 represents his concept of vicinus, one is confronted with certain dis- 

 crepancies between the specimen and the original description. In the 

 latter he points out the similarity to hilineatus and reports a difference 

 in the apex of the peritreme^ — a character already shown (supra) to be 

 nonexistent in hilineatus. He recorded a single costal seta, where the 

 Mexican specimen shows three setigerous punctures. His description 

 of the cephalic bristles is of the primary setae, not of the submarginal 

 setigerous punctures which consist of four close-set punctures imme- 

 diately anterior to the eye and one more widely removed beyond. This 

 Mexican specimen also lacks antennals H to V, so the characters per- 

 taining thereto cannot be verified, but the described condition fits the 

 variations accepted in the present study for hilineatus. The descrip- 

 tion of the punctation of the pronotum, scutellum, corium, and venter 

 agrees both with the Mexican specimen and hilineatus as here under- 

 stood. Since discrepancies of this sort are numerous in Signoret's 

 cydnid work — even where the type itself was available for study' — one 

 should not attach too much importance to them. So, with apparently 

 no characters for separating vicinus from hilineatus, the former must 

 be considered a synonym of the latter. 



Pangoeus douglasi Signoret, "Australia," and Pangoeus scotti 

 Signoret, "Nouvelle-Zelande." Although these two species were 

 described from areas well-removed from the native range of the genus, 

 examination of the types (Wien) leaves no doubt of then- synonymy 

 with hilineatus. Signoret was undoubtedly misled by the distant 

 localities and his own error in figuring the apex of the peritreme of 

 hilineatus. Two possible explanations may be offered for the remote 

 type localities. The simplest is that the specimens were mislabeled. 

 The second is that the specimens may have been carried to these 

 localities by commerce. Being burrowers, they could easily be scooped 

 into the holds of ships with soil that was added for ballast and then 

 be unloaded to make room for a cargo; or they could have travelled 

 in soil about the roots of plants. In either event, neither douglasi 

 nor scotti appears to have been reported from its original type locality 

 by subsequent authors, except on the authority of Signoret's original 

 descriptions. There is, however, a specimen (MCZ) labeled as coming 

 from the Society Islands. Although no further data are given on the 

 label, this record plus those of Signoret's specimens lend plausibility 

 to the theory that hilineatus can be readily transported by commerce. 



Pangoeus spangbergi Signoret, "Texas." The type specimen (Stock) 

 was loaned for study and proved to be a Belfrage specimen. Signoret's 

 comparison of this with P. moestus, a member of the nominal subgenus, 



501991—60 9 



