Daily Archives: July 7, 2017

Cerceris fumipennis

Cerceris fumipennis

Cerceris fumipennis

After taking the picture of the lady beetle larva in the woods, I crossed the stream on a fallen tree trunk. I worked my way from there through a fairly dense area of brambles and small trees to the slope that leads to what I call the uplands part of the empty lot. This is about 30 feet higher than the lowlands across the stream and it is mostly clear of trees. It is filled with ragweed and milkweed with a few empty spots that are almost barren, with just bare clay which sometimes holds standing water and other times is baked into a cracked, hard surface. In one of those empty spots, I followed this wasp, which is Cerceris fumipennis, an apoid wasp (Apoidea) in the family Crabronidae. It landed and disappeared into this little hole in the ground. I figured it would eventually come out again so I got down and waited. I was rewarded for my patience when he appeared at the entrance and was able to get a half dozen shots off before he flew off into the distance.

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Lady Beetle Larva

Lady Beetle Larva

Lady Beetle Larva

It was a beautiful, if somewhat hot afternoon today and I went out into the woods next to my building. As I walked through the underbrush under the sycamore, tulip poplar, redbud, walnut, and black cherry trees, I noticed this little creature on a leaf. This is the larva of a lady beetle. The family Coccinellidae, the lady beetles, has about 6,000 species in 360 genera worldwide and nearly 500 in eastern North America. I have no idea to which of those this larva belongs and I’m not even going to try to figure it out. The adults are generally easier to narrow down but to me, anyway, the larva are just too much alike. I found a key to the larva of North American lady beetles but it starts out as follows. Tell me how helpful this is to you:

Mandible with digitiform teeth, retinaculum absent; terga with scoli, sometimes with parascoli; frontoclypeal suture complete; antenna long, 3 or more times as long as wide, of nearly uniform diameter.

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