1962 Journal of the Lepidopterists' Society 199

NOTES ON ACADICA AND OTHER UNUSUAL HAIRSTREAK RECORDS (LYCJENIDJE) IN SOUTHEASTERN PENNSYLVANIA

During the summer of 1961 I had the unexpected pleasure of discover­ ing a colony of Satyrium acadica (Edwards) in Cheltenham Township, just north of Philadelphia, Pa. Shortly afterwards information was communicated to me of a similar discovery along the Wissahickon Creek, about eight miles to the southwest of the aforementioned locality. S. acadica is a northern species and its occurrence this far south as a breeding resident is rather exceptional. Mr. GEORGE EHLE mentions that he had not heard of it south of the Pocono Mountains in Pennsylvania. This may be a new southern record for acadica as a breeding resident. Records are from July 4-11. The species is not numerous. I took only one but saw several (5 or 6) more. My specimen is a very large female, expanding 33.4 mm. A male caught along the Wissahickon Creek measured 27.5 mm. These dates are somewhat after the common S. falacer and edwardsii hit their peak. Both localities are damp and the seems to be associated with the . It visits blossoms of Milkweed (Asclepias syriaca) freely but does not seem to wander far from the , and is quite wary. Several good Hairstreak records for Philadelphia are based on strays of southern species. On Sept. 10, 1960, I had the fantastic luck to catch one each of Eupsyche m-album (Boisduval & LeConte) and Calycopis cecrops within one hour's time. The cecrops seemed fresh but the m-album was very worn. Another good species, which is common in a few spots mostly west of the city, is Satyrium titus.

ARTHUR M. SHAPIRO, 7636 Thouron Ave., Philadelphia 50, Pa., U. S. A.

ADDITIONAL RECORDS OF SATYRIUM BEHRII (LYClENIDJE) FROM OREGON

The remark in Ehrlich & Ehrlich, How to know the (p.192; 1961), by CLENCH, that Satyrium behl'ii was not recorded from several expected states, has resulted in the publication of records from Nevada by PHILIP (J ourn. liepid. soc. 15: 56; 1961) and from Oregon by CLENCH (ibid. 16: 44; 1962). Two additional Oregon specimens are in the collection of TILDEN. One is labelled incompletely, "Metolius River, Ore., VII.3.40", without notation 200 FIELD NOTES Vo1.l6: no.3 of collector; the source of this specimen is not known. The second is labelled, "Spring Creek, Baker Co., Ore., V.2.54, James Baker, Collector." The wide difference in dates here indicates either extreme difference in climate in the two localities, or a wider range of flight dates than is usual in California. In the Artemisia tridentata (Sage Brush Scrub) habitat of eastern California, the distribution of Satyrium behrii is reasonably continuous, and there seems no reason why it should not be so in the proper habitat wherever it occurs. The paucity of records from certain states certainly must be due to lack of collecting in such areas and to incomplete re­ porting of such collecting as has been done. Sage Brush is not an attrac­ tive habitat to many collectors. Moreover, S. behrii tends to "sit tight" rather than to fly freely; and being unusually inconspicuous at rest, it is easily overlooked.

J. W. TILDEN, San Jose State College, San Jose 14, Calif., U. S. A.

EVENING MATING IN HYPAUROTIS CRYSALUS (LYCJENIDJE) IN COLORADO

While helping with a chipmunk-trapping expedition in Mesa Verde National Park at 7:00 pm MST on 11 Aug. 1962, I was surprised to notice a number of large hairstreaks flying around the tops of the oak bushes. The were very active, although the little ravine was in the deep shadow of the large hill to the west. Their flight contained at least three distinguishable patterns: erratic flight from branch to branch; circling of branch tips; and close chasing usually restricted to a small space around the branch tips. The chasing was sometimes terminated when two individuals alighted together but I was unable to observe their subsequent behavior. I had a seven-foot net along and in the next 40 minutes collected ten specimens of crysalus. Among these were two mat­ ing pairs. The butterflies remained active until they could barely be seen. The location was the turnoff about two hundred yards below the Montezuma Valley Overlook, Mesa Verde Nat. Park, Montezuma Co., Colorado. I have since found out that evening mating by crysalus is not unique among North American hairstreaks; Dr. C. L. REMINGTON tells me that he has observed it in Satyrium acadica in Connecticut.

DONALD S. CHAMBERS,. Dept. of Biology, Yale University, New Haven, Conn., U. S. A.