NORTH OF MEXICO. 



285 



A. oarinata, (Peleoyph.) Leo., Ann. Lye. 5-128; Thomson, Arcana 1, pi. XII, fig. 1. 

 Philolitlius oarinatus, Lao. Genres Vol. V., p. 158, pi. 51, %- 4. 



Collected by Dr. 1 ^oconto at San Felipe, Cal. The figure given by Lacorclaire seems 

 to give an idea of the form of this species. 



Length .65-80 inch. 



A. bifuroa, (Peleoyph.) Lee, Proc. Acad. 1SG1-337. 



From Cape San Lucas, Lower California. The elytra are very feebly transversely 

 convex, and have on each a triple series of very short hairs arranged in the interspaces of 

 series of confusedly placed punctures. Length .13 inch. 



A. oonnivens, (Pelecyph.) Lee., Now Species, p. 140. 



Closely related to the preceding species. It is doubtful whether it is really distinct, 

 though I retain it as such until a full series shows its identity beyond doubt. Cape San 

 Lucas. Cabinet of Mr. II. Ulke. Length .40 inch. 



A. eon linens, (Peleoyph.) Lee, Ann. Lye. 5-138. Philolithus eonllnens, Lac. Genres 5, 158. 



Thorax with a distinct slightly reflexed thick margin. Marginal costa of elytra dis- 

 tinct, another starting from near the humerus and extending three-fourths the length of 

 the elytra. Humeral angles distinct. Length .75-.90 inch. Colorado desert and 

 eastward. 



A. parallela, (Pelecyph.) Lee, Ann. Lye 5. 128. Phllolithus parallelus, Lac. Genres 5-158. 



Similar in form to the preceding. Light brown, sinning. Humeral angles of elytra 

 rounded, marginal eosta, acute, nearly reaching the apex; another short costa parallel 

 with the margin, and a short distance from it extending through the middle two-thirds of 

 the length of the elytra. The sides of the elytra are very feebly rounded. Thorax with 

 distinct slightly reflexed margin. Vallecito, California. Length .(>() inch. 



A. sexoostata, (Pelecyph.) Lee, Proc. Acad. 1861, 887. 



Similar in form to the preceding; the elytra are, however, more nearly oval and the 

 side of thorax more strongly rounded, and with the hind angles more evident. The elytra 

 have an acute margin and two costa? on the disc of each, of which the inner is much the 

 longer. From Cape San Lucas. 



Length .50 inch. 



A. obsoleta, (Pelecyph.) Lcc, Ann. Lye 5-128. Philolithus obsoletus, Lac. Genres 5-158. 



Similar in outline to bifurca. The thorax is, however, nearly flattened above, rather 

 declivous in front, and with a transverse impression at hase. The elytral margin is very 

 distinct. There is a second short costa parallel with the margin and very close to it, and 

 occupying the middle third of the length of the elytra. 



Collected at Warner's ranchc, California, (borders of Colorado desert). 



Length .10 inch. 



AMERI. P1IILOSO. SOO VOL. XIV. — 72 



