C. Koford 3 Arbiceus lituratus palmarum and A. jamaicensis December 5, 1956 Barro Colorado Is., C.Z. two in mist net on duty Trail SE of Chapman House. One ♀, min.; dark gray, no facial stripes, forearm 62; LR↑RR×///// ///+I. One ♂, no scrotal tester, forearm 72, brown, four stripes; LR↑RR ×/////// //IX . At 6 a.m. on December 6, 1956, two in net on duty, 1 man pump house. One ♀, min., forearm 69, released LR 3 RR I . / ♂ min. forearm 61, LR 3 RR 2; had 4+ mites on wing membranes, 3 flies (2 left) in ventral fur); Dh. gray, poor facial stripes. / A ♂, forearm 61, dh. gray, poor facial stripes, had adult appearing myxobes + were saved as 1878 C PK (= jamaicensis) December 9, 1956. ♀, forearm 67, nipples small, well developed facial stripes, yellow tragus. Acted docile. Taken in net nr. Chapman House after 11:30 p.m. last evening. Marked LR 3 RR 3. Had 6± mites on wing membranes. wt. 76 gms. Released. Unvested in air when released. December 19, 1956. One ad. ♀ with elongated swollen nipples in mist netw. Chapman House & bole tree in a.m., (♀ 1883). 1882 & 1884 apparently jamaicensis, being smaller. December 11, 1956. About 10 p.m. took 2 in net nr. Chapman House. Ad. ♂, tan, facial stripes, tester half protruding, forearm 67½; removed 1 fly + 4+ mites; marked LR 3 RR A / 5 & released. Another at same time dark gray, poor four stripes, forearm 61½, marked LR 3 RR 4 & released (= jamaic., ?). A Parallia in net same time, possibly coming in response distress calls Arbiceus when in hand. Overcast evening & calm. December 12, 1956 In morning removed an min. ♂, forearm 61, from same net nr Chapman House. Marked LR 2 RR I and released (2 Christmas flies in net), //+↑+/////