FROGS OF COLOMBIA — COCHRAN AND GOIN 467 



corner of eye to level of groin; a pair of less distinct lateral folds; a 

 weak glandular ridge from posterior corner of eye above tympanum, 

 ending behind it, and another behind angle of mouth; a distinct skin- 

 fold across chest; a ventral disk; a pah* of lateral external vocal sacs 

 in the male. 



Dimensions. — Head and body, 51.5 mm.; head length, 18 mm.; head 

 width, 18 mm.; femur, 18.5 mm.; tibia, 21 mm.; foot, 20.5 mm.; hand, 

 12.5 mm. 



Color in alcohol. — Back dull drab, with an indistinct blackish slate 

 interorbital triangular patch and vague longitudinal markings on each 

 side of the midline; dorsolateral folds sharply outlined by black below, 

 this color fading out on the sides; two rounded black spots on loreal 

 region, a crescentic black mark around anterior half of lower eyelid, 

 and a wide black stripe from posterior part of lower eyelid through 

 tympanum and ending above shoulder; four irregular black spots 

 along border of upper lip ; a white line marking the short gland behind 

 commissure of mouth; venter pale buff, the throat and chest very 

 heavily reticulated with sepia, and some large sepia spots down 

 center and sides of belly; upper surface of limbs olive with three or 

 four moderately wide clove brown crossbars; anterior femur dull 

 wood brown suffused with small sepia spots; posterior femur sepia 

 with a few small lighter and darker spots; palms of hands and soles 

 of feet clove brown, the tips of the digits olive-buff. 



Remarks. — USNM 147480 consists of 20 just-metamorphosed 

 young, of which the smallest individual, with no vestigial tail, measures 

 13.5 millimeters in head-and-body length. The 13 adults in the series 

 USNM 147457-69 range from 44 to 55 millimeters in head-and-body 

 length. No trace of thumb or chest spines is apparent in any of the 

 males. 



The above-described Colombian specimen agrees with the type of 

 L. rubido (MCZ 4780, an adult male from Moyabamba, Peru) 

 except in a few minor details. Analysis of the critical measurements 

 shows that rubido has a shorter foot proportionately than any other 

 Colombian frog of the genus, while the femur and tibia also are quite 

 short. A paratype of curtus Barbour and Noble (now USNM 75990, 

 from Bellavista, Peru) has similar proportions, and it may be that 

 additional Peruvian examples will prove the two to be conspecific. 



L. rubido can be confused with young specimens of L. pentadactylus, 

 as the heavy build and dark spotting on legs are quite similar. But the 

 latter grows to a much greater size (around 190 mm. total length, as 

 contrasted with probably less than 100 mm. for rubido); also, the 

 dorsolateral folds extend to the level of the groin in rubido and to the 

 sacrum in pentadactylus. 



